w,x অপেক্ষা 10% কম হলে এবং y,z d অপেক্ষা 30% কম হলে wy, xz অপেক্ষা শতকরা কত কম ?
A. 10%
B. 20%
C. 37%
D. 40%
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সঠিক উত্তরঃ
C.
37%
Explanation:
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