David played 6 games of bowling. His scores for the first 5 games were 138, 169, 101, 171 and 159 points respectively.
- Find his average score for the first 5 games.
- After his fifth game, his average score increased by 4.9 points. Find his score for his sixth game.
(a)
Total score of first 5 games
= 138 + 169 + 101 + 171 + 159
= 738
Average score of first 5 games
= 738 ÷ 5
= 147.6
(b)
Average score of 6 games
= 147.6 + 4.9
= 152.5
Total score of 6 games
= 6 x 152.5
= 915
Score of David's sixth game
= 915 - 738
= 177
Answer(s): (a) 147.6; (b) 177