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1. If w is 10 percent less than x, and y is 30 percent less than z , then why is what percent less than xz?
- A. 10%
- B. 10%
- C. 10%
- D. 10%
Answer: Option C
Explanation:
ধরি, x = 100
then, w = 100 - 100× 10/100 = 9আবার, If z = 100
then, y = 100 - 100 × 30/100 = 70
সুতরাং, wy = 90 × 70 = 6300
and xz = 100 × 100 = 10000
Difference = 10000 - 6300 = 3700
Difference in percentage = 3700/10000 × 100% = 37%
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