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JAMB Mathematics 2024 Paper

Question : 33

Total: 50

The mean of the numbers 13, 16, x, 18, 21, 2x, 35, is 22. Find the value of x

Solution:

Mean = $\frac{13+16+x+18+21+2x+35}{7}$ = 22

103 + 3x = 154

3x = 154 - 103 = 51

x = $\frac{51}{3}$ = 17

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