Question

PLEASE HELP Complete the table with the number of sit-ups you have to do sunday so that the mean number of sit-ups per day is 100 monday- 100

Tuesday- 65
wednesday-120
thursday-150
friday- 90
saturday-0
sunday- ??

Answer 1

The complete table will be:

`Monday - 100\\ Tuesday-65\\ Wednesday- 120\\ Thursday-150\\ Friday-90\\ Saturday- 0\\ Sunday-175`

Step-by-step explanation

Suppose, the number of sit-ups in Sunday is
`x`

Mean is the simple average of some numbers. For finding the mean number of sit-ups per day, we need to divide the 'total number of sit-ups' by the 'total number of days'.

Here the total number of days is 7 and the total number of sit-ups for 7 days
`= 100+65+120+150+90+0+x= 525+x`

Given that, the mean number of sit-ups per day is 100. So, the equation will be...

`(525+x)/(7)=100\\ \\ 525+x=700\\ \\ x= 700-525=175`

So, the number of sit-ups you have to do Sunday is 175.