Question

In a list of 100 numbers , the fraction of numbers greater than 15 is (19/25) and the fraction of numbers less than 15 is (7/50). How many numbers in the list are equal to 15

Answer 1

@Hero

Answer 2

Stupid mistakes :P

Answer 3

Let the quantity of numbers equalling 15 = x
\[(100\times \frac{19}{25})+(100\times \frac{7}{50})+x=100\]
Now you just need to solve for x.