Question

this years, john played in 10 baseball games. In these games, he had hit the ball 2,3,0,1,3,2,4,0,2 and 3 times. In the first 10 games he plays next year, john wants to increase his average (mean) hits per game by 0.5. What is the total number of hits john needs over the first 10 games next year to achieve his goal?

Answer 1

The average number of hits is 2+3+0+1+3+2+4+0+2+3=20, an average of 2.
So John wants to achieve 2.5 as the average. That means his total has to be 10×2.5=25 hits.