Question

The mean of 8 numbers is 54.75. What would the new mean be if the numbers 94 and 102 are added to the data set?

Answer 1

I thought that you would take that mean and add 94 and 102 to it and then divide that by 10 and I ended up getting 25.075 but that isn't one of my options.

Answer 2

total after adding 94 and 102 = 8 * 54.75 + 94 + 102

new mean = this total / 10

Answer 3

54.75+102+94=250.75
250.75/10=25.075

Answer 4

you should multiply 54.75 by 8 to get the 'old' total

Answer 5

Ohh i didn't multiply

Answer 6

Okay I get it now thanks.

Answer 7

yw