Two-fifth of one-third of three-seventh of a number is 15. What is 40 percent of that number ? Options: A . &nbsp72 B . &nbsp84 C . &nbsp136 D . &nbsp140 E . &nbspNone of these

Two-fifth of one-third

Question

Two-fifth of one-third of three-seventh of a number is 15. What is 40 percent of that number ?

Answer: Option E

Let the number be `x` .Then ,`2/5 of 1/3 of 3/7 of x = 15 hArr x = (15 xx 7/3 xx 3 xx 5/2) = 525/2`

`:.` `40% of 525/2 = (40/100 xx 525/2)` = 105.

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