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1. The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y?
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option C
Explanation:
Hints: (2 + 7 + 6 + x) / 4 = 5
15 + x = 20
x = 20 - 15
x = 5
and, (18 + 1 + 6 + x + y)/5 = 10
18 + 1 + 6 + 5 + y = 50
y = 20
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