Give that the mean of 2 5 x 1 x 2 7 and 9 is 6 ... - JAMB Mathematics 2022 Question
Give that 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
correct option: c
To find the value of x,
6 = \(\frac{2 + 5 + x+1 + x+2 + 7 + 9}{6}\)
6 * 6 = 2 + 5 + x+1 + x+2 + 7 + 9
36 = 2x + 26
36 - 26 = 2x
10 = 2x
x = 5
median = \(\frac{7+6}{2}\)
= 6.5
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