Billy played 5 games of bowling. His scores for the first 4 games were 134, 113, 106 and 141 points respectively.
- Find his average score for the first 4 games.
- After his fifth game, his average score increased by 5.9 points. Find his score for his fifth game.
(a)
Total score of first 4 games
= 134 + 113 + 106 + 141
= 494
Average score of first 4 games
= 494 ÷ 4
= 123.5
(b)
Average score of 5 games
= 123.5 + 5.9
= 129.4
Total score of 5 games
= 5 x 129.4
= 647
Score of Billy's fifth game
= 647 - 494
= 153
Answer(s): (a) 123.5; (b) 153