The complete table will be:
[tex]Monday - 100\\ Tuesday-65\\ Wednesday- 120\\ Thursday-150\\ Friday-90\\ Saturday- 0\\ Sunday-175[/tex]
Explanation
Suppose, the number of sit-ups in Sunday is [tex]x[/tex]
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 [tex]= 100+65+120+150+90+0+x= 525+x[/tex]
Given that, the mean number of sit-ups per day is 100. So, the equation will be...
[tex]\frac{525+x}{7}=100\\ \\ 525+x=700\\ \\ x= 700-525=175[/tex]
So, the number of sit-ups you have to do Sunday is 175.
