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1. if w is 10% less than x and y is 30% less than z , then wy is what persent less than xz ?

  • A. 10%
  • B. 10%
  • C. 10%
  • D. 10%

Answer: Option C

Explanation:

ধরি, x = 100; তাহলে,w= 100-100 এর 10%=100-10=90

আবার, z= 100 ; তাহলে, y= 100-100 এর 30%= 100-30=70

এখানে, wy= 90×70=6300

এবং, xz=100×100=10000

wy,xz এর চেয়ে শতকরা কম হবে= 10000-6300/10000 ×100

= 3700/10000 ×100= 37%


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