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MATHEMATICS

JAMB 2022 - Question 34

Mathematics 2022 JAMB Past Questions - Question 34: If the mean of 2, 5, (x+1), (x+2), 7 and 9 is 6. Find the median

If the mean of 2, 5, (x+1), (x+2), 7 and 9 is 6. Find the median

A: 5.5

B: 5

C: 6.5

D: 6

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Correct Answer

Explanation

Firstly; solving for x6 = 2+5+x+1+x+2+7+9/6cross multiply to have:6 * 6 = 2 + 5 + x+1 + x+2 + 7 + 936 = 2x + 2636 - 26 = 2x10 = 2xx = 5Median = 7+6/2→ 6.5