Railway Recruitment Board Mathematics — Question 646
Question
If 20% of a number is 50, what is 40% of that number?
- 75
- 100
- 125
- 150
Correct answer
B — 100
Explanation (English)
20% of number = 50, so number = 50×(100/20) = 250. Now 40% of 250 = 250×(40/100) = 100
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