Question

Six numbers have a mean of 4.5 and five of the numbers are 4,3,4,6,1.

The other number is x.
Work out the value ofx.

Answer 1

X = 9

Explanation:

4 + 3 + 4 + 6 + 1 + x / 6 = 4.5

18 + x / 6 = 4.5

cross multiply

18 + x = 4.5 × 6

18 + x = 27

collect like terms

x = 27 - 18

x = 9