Question

4. The average of three numbers is 50. The second number is greater than the first
by 3 but smaller than the third by 9. Find the second number.
(1) 45
(2) 48
(3) 50
(4) 39​

Answer 1

(2) 48

Explanation:

Let Second Number = x

Then,

First Number = x-3

Third Number = x+9

Therefore,

Average = [(x-3) + x + (x+9)] ÷ 3 = 50

(3x+6) ÷ 3 = 50

x + 2 = 50

x = 48

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