1.

The mean of 10, 15, x, 5, 15 is 15. What is the value of x ?

Answer»

As mean of numbers 10, 15, x, 5, 15 is 15

Mean = sum of observations /Number of observations

Hence,15 = (10+15+x+5+15)/575 = 45 + xx = 75 - 45x = 30

Therefore, value of x = 30



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