Question

After 5 matches the mean number of goals scored by a football team per match is 1.8. if they score 3 goals in their 6th match, what is the mean after the 6th Match

Answer 1

After 5 games the team scored $1.8*5=9$ goals.

After 6 games the team scored $9+3=12$ goals.

The mean after 6 games is $\frac{12}{6}=2$ goals.