Question

The mean of four number is 14.If two numbers, x and x + 2 are added to the set of data, the new mean is 15.calculate the value of x​

Answer 1

`x = 16`

Explanation:

Mean = Total ÷ Number of Data

Total = 14 × 4 = 56

Total after = 15 × 6 = 90

Difference = 90 - 56 = 34

Hence,

`x + x + 2 = 34`

`2x = 32`

`x = 16`