If the mean of 4 y 8 and 10 is 7 Find Y - JAMB Mathematics 2016 Question
If the mean of 4, y, 8 and 10 is 7. Find Y?
A
6
B
10
C
7
D
9
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Correct Option: A
(\frac{4 + y + 8 + 10}{4}) = 7
22 + y = 4 x 7
22 + y = 28
y = 28 - 22 = 6
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