Question

If the mean 56 58 55 x 59 is 57 then find value of x

Answer 1

x = 57

Explanation:

Mean is sum of all the data divided by the number of data.

Number of data = 5

Mean = 57

`\sf ~~~~~~~~~~~~~ (sum \ of \ data)/(5)=57\\\\\\(56+58+55+x+59)/(5)=57\\\\\\Cross \ multiply,\\\\`

x + 228 = 57 * 5

x + 228 = 285

x = 285 - 228

x = 57