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Question

A number, x, equals 80% of the average of 5, 7, 14 and a number y.  If the average of x and y is 26, then value of y is:


Your Answer
A
13
Your Answer
B
26
Correct Answer
C
39
Your Answer
D
42
Your Answer
E
None of these

Solution

The correct option is C 39
Average of 5, 7, 14 and y=5+7+14+y4
Therefore, x=80% of 5+7+14+y4=80100×26+y4
x=26+y5   (1)
Also x+y2=26   (2)
From (1) and (2), we get 52y=26+y5y=39

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