Question

The mean of 4 numbers is 88 . What is the fourth number if three of the numbers are 80 95 and 85?

Answer 1

Step-by-step explanation

The mean is the sum of variables divided by the number of variables

Mean = (Σx)/N

x = each variable

Σx = Sum of the variables

N = number of variables

Let the fourth number be a

Σx = Sum of the variables = a + 80 + 95 + 85 = a + 260

N = number of variables = 4

Mean = 88