The difference between a number and its two-fifth is 510. What is 10% of that number ? Options: A . &nbsp12.75 B . &nbsp85 C . &nbsp204 D . &nbspNone of these

The difference between

Question

The difference between a number and its two-fifth is 510. What is 10% of that number ?

Options:

A . 12.75

B . 85

C . 204

D . None of these

Answer: Option B

Let the number be `x` . Then, `x - 2/5 x = 510 hArr 3/5 x = 510 hArr x = ((510 xx 5)/(3))` = 850.

`:.` 10% of 850 = 85.

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