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I haven't done much maths for years and was never much good at averages. How do I work out this problem? After 15 games, Ben's average score was 17. After 20 games, his average increased to 21. What was Ben's average number of points per game in the last 5 games?
Av of 17 in 15 games means the total was 17 x 15
Av of 21 in 20 games means the total was 21 x 20
By subtracting one from the other you will get the score in the 5 new games. Then divide by 5.
Hope that helps.
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Last edited by ShivamS (Yesterday 09:37:33)
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