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MATHEMATICS

JAMB 2016 - Question 2

Mathematics 2016 JAMB Past Questions - Question 2: If the mean of 4,y,8 and 10 is 7,Find y.

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 Answer

Explanation

Ex = 4+y+8+10 = y+22n = 4, x = 7the mean, x, = Ex/ni.e. 7 = y+22 /47x4 = y=2228 = y+2228 - 22 = ytherefore y = 6To find the value of y, we can use the formula for the mean (average):Mean = (Sum of all the numbers) / (Number of values)Given that the mean of 4, y, 8, and 10 is 7, we can set up the equation:(4 + y + 8 + 10) / 4 = 7Now, we can solve for y:(4 + y + 8 + 10) = 7 * 422 + y = 28y = 28 - 22y = 6Therefore, the value of y is 6.