jakolik wrote:

A vendor sells 60 percent of apples he had and throws away 15 percent of the remainder. Next

day he sells 50 percent of the remainder and throws away the rest. What percent of his apples

does the vendor throw?

(A) 17

(B) 23

(C) 77

(D) None of these

(E) 75

Ans : B

I believe that the best way to tackle percentage problems is by considering a dummy value - 100.

In this case : Let's assume vendor has 100 apples in all.

1: 60 apples are sold. Remainder: 40 apples

2: 15% of 40 =

6 are thrown away; Remainder: 34 apples

3: 50% of 34 = 17 are sold and rest

(17) are thrown away; Remainder = 0

From (2) & (3), Total no. of apples thrown away = 6 + 17 = 23

To sum it all up, based on our assumption of 100 apples, 23 are sold, i.e 23 %

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