Question

A cafe is open for six days a week. There was a mean number of 86 customers for five days. On the next day there were 122 customers. What is the mean number of customers over the six days?

Answer 1

92

Explanation:

The mean is calculated as

mean =
`(sum)/(count)`

The sum of customers over the 5 days is

`(sum)/(5)` = 86 ( multiply both sides by 5 )

sum = 430

Thus mean over the 6 days is

mean =
`(430+122)/(6)` =
`(552)/(6)` = 92