841 . A department store receives a shipment of 1,000 shirts, for which it pays $9,000. The store sells the shirts at a price 80 percent above cost for one month, after which it reduces the price of the shirts to 20 percent above cost. The store sells 75 percent of the shirts during the first month and 50 percent of the remaining shirts afterward. How much gross income did sales of the shirts generate?

A. Tk. 10800
B. Tk 12150
C. Tk 13500
D. Tk 14800
E. None of these

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Answer: Option C

Explanation:

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842 . A die is rolled and a coin is tossed What is the probability that a 3 will be rolled and a tail tossed?

A. 1/2
B. 1/6
C. 1/8
D. 1/12

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Answer: Option D

Explanation:

এখানে,একটি নিরপেক্ষ ছক্কার ৩ এবং মুদ্রার Tail আসে ১ বার (3T)

অতএব, অনুকূল ফলাফল = 1

এবং মোট ফলাফল = 12

অতএব, সম্ভব্যতা = 1/12

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প্রবেশনারি অফিসার | 02-04-2022

A. Tk. 145.60
B. Tk. 165
C. Tk. 210
D. Tk. 182
E. None of these

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Answer: Option A

Explanation:

এই Math টিতে 'discount' এর উপর 'discount' হিসাব করতে হবে। যদি 30% off থাকে , তবে (100 - 30)  =  70% price এ বিক্রি হচ্ছে।
so 30% discount এর জন্য 260Tk হবে  =  260  ×  .70
                                         =  182 Tk.
আবার, এই discount price এর উপর 20% discount  =  182  ×  .80
                                                       =  145.60 টাকা

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844 . A discount series 10%, 15% and 20% is equal to a single discound of :

A. 38.8%
B. 61.2%
C. 76.5%
D. 23.5%

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Answer: Option A

Explanation:

the single equivalent discount can be calculated as: 1 - (1 - d1) × (1 - d2) × (1 - d3), where d1, d2, d3 are the discounts. Therefore, the single discount equivalent to the successive discounts of 10%, 15%, and 20% is 38.8% or 0.388

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তিতাস গ্যাস ট্রান্সমিশন এন্ড ডিষ্ট্রিবিউশন কোম্পানী লি. | সহকারী ব্যবস্থাপক (অ্যাকাউন্টস) | ২৭.০৪.২০১৮

A. 25%
B. 16.67%
C. 8.33%
D. 6%

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Answer: Option C

Explanation:

প্রশ্নে বলা হচ্ছে যে, 45 টাকা কেজি দরের 2 কেজি Vegetable ঘি'র সাথে 70 টাকা কেজি দরের 3 কেজি Standard ঘি'র সাথে Mix করে তা 65 টাকা কেজি দরে বিক্রয় করা হলো । শতকরা লাভের পরিমাণ কত ?
2 কেজি Vegetable ঘি'র ক্রয়মূল্য = 2 × 45 = 90 টাকা
আবার, 3 কেজি Standard ঘি'র ক্রয়মূল্য = 3 × 70 = 210 টাকা
(2 + 3) = 5 কেজি ঘি'র মোট ক্রয়মূল্য = 90 + 210 = 300 টাকা
আবার, 5 কেজি ঘি'র বিক্রয়মূল্য = 5 × 65 = 325 টাকা
লাভ হয় = (325−300300 × 100) = (25300 × 100) = 8.33%

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846 . A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work?

A. 5 days
B. 6 days
C. 8 days
D. 9 days

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Answer: Option B

Explanation:

Hints: A and B in 1 day together work ( 1/10 + 1/15) portion = (3 + 2)/30 = 5/30 = 1/6

Together they finish in 6 days.

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847 . A drink contains 20% cranberry juice, 20% raspberry juice and the rest is apple juice. You added 250 ml water in 750 ml of the drink. Now, what is the ratio of water of water to apple juice in the drink?

A. 6:5
B. 9:5
C. 5:12
D. 5:9
E. None of these

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Answer: Option D

Explanation:

60% of 750 = 0.6× 750 = 450

Now, 250 : 450 = 5 : 9

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848 . A driver of an auto rickshaw sees a lorry m ahead of him .After 30 seconds the lorry 90 m behind. If the speed of the auto rickshaw is 38 km /hr, then what is the speed of the lorry?

A. 23 km/hr
B. 25 km /hr
C. 20 km /hr
D. 18 km /hr

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Answer: Option C

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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯

A. 1/2
B. 1/3
C. 1/4
D. 1/8

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Answer: Option D

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প্রবাসী কল্যাণ ব্যাংক-সিনিয়র অফিসার-09-10-2021

A. 3/4
B. 1/2
C. 1/8
D. 1/16
E. 1/32

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Answer: Option B

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Bangladesh Bank - Officer(Cash) - 2011

A. 2/3
B. 3/4
C. 5/6
D. 1/6

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Answer: Option C

Explanation:

Let's break it down:

Number of favorable outcomes (odd numbers): There are three odd numbers on a six-sided dice, which are 1, 3, and 5.

Number of favorable outcomes (numbers less than 4): There are three numbers less than 4 on a six-sided dice, which are 1, 2, and 3.

However, we need to be careful not to count the number 1 twice since it satisfies both conditions (odd and less than 4).

So, the total number of favorable outcomes is 3 + 2 - 1 = 4.

Total number of possible outcomes: Since we are rolling a fair six-sided dice, there are six possible outcomes (numbers 1 to 6).

Now, we can calculate the probability:

Probability = (Number of favorable outcomes) / (Total number of possible outcomes) Probability = 4 / 6 Probability = 2 / 3

Therefore, the probability of getting an odd number or a number less than 4 when rolling a fair six-sided dice is 2/3

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852 . A family had dinner in a restaurant and paid $30 for food. They also had to pay 9.5% sale tax and 10% for the tip. How much did the pay for the dinner?

A. $35.85
B. $33.60
C. $35.45
D. $36.55
E. $36.35

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Answer: Option A

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Bangladesh Bank - Officer(Cash) - 2011

A. 100
B. 104
C. 108
D. 120
E. None of these

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Answer: Option B

Explanation:

Lets see if he needed 5 poles at each side
Similarly, no. of poles  =  27  ×  2  +  25  ×  2  =  104

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854 . A farmer had 20 hens. All but 2 died. How many hens are still alive?

A. 2
B. 10
C. 15
D. 18

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Answer: Option A

Explanation:

All but 2 died means only 2 survived.

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855 . A farmer had 20 hens. All but 2 died . How many hens are still alive ?

A. 2
B. 10
C. 15
D. 18

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Answer: Option A

Explanation:

All but 2 died means only 2 survived.

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Bangladesh Bank - Assistant Director - 2009

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842 . A die is rolled and a coin is tossed What is the probability that a 3 will be rolled and a tail tossed?

844 . A discount series 10%, 15% and 20% is equal to a single discound of :

845 . A dishonest trader mixes 2 kg of vegetable ghee costing Tk. 45 a kg with 3 kg of standard ghee costing Tk. 70 per kg. He sells the mixed ghee at Tk. 65 per kg. what is his percentage of profit?

846 . A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work?

847 . A drink contains 20% cranberry juice, 20% raspberry juice and the rest is apple juice. You added 250 ml water in 750 ml of the drink. Now, what is the ratio of water of water to apple juice in the drink?

848 . A driver of an auto rickshaw sees a lorry m ahead of him .After 30 seconds the lorry 90 m behind. If the speed of the auto rickshaw is 38 km /hr, then what is the speed of the lorry?

849 . A fair coin is flipped three times. What is the probality that coin lands head each time?

850 . A fair coin is thrown in the air four times. If the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss ?

851 . A fair six-sided dice is rolled. Find the probability of getting an odd number or a number less then 4 -

852 . A family had dinner in a restaurant and paid $30 for food. They also had to pay 9.5% sale tax and 10% for the tip. How much did the pay for the dinner?

853 . A farmer built a fence around around his square plot. He used 27 fence poles on each side of the square. How many poles did he need altogether?

854 . A farmer had 20 hens. All but 2 died. How many hens are still alive?

855 . A farmer had 20 hens. All but 2 died . How many hens are still alive ?

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