JAMB - Mathematics (2022 - No. 35)
Find x if the mean of 2x, 4x, 2x - 13 and 6x is 4.
1.5
2.0
1.0
0.5
Maelezo
mean (4) = \(\frac{2x + 4x + 2x - 13 + 6x}{4}\)
16 = 14x - 13
16 + 13 = 14x
x = 29/14 or 2.07
mean (4) = \(\frac{2x + 4x + 2x - 13 + 6x}{4}\)
16 = 14x - 13
16 + 13 = 14x
x = 29/14 or 2.07