David played 5 games of bowling. His scores for the first 4 games were 103, 168, 111 and 176 points respectively.
- Find his average score for the first 4 games.
- After his fifth game, his average score increased by 4.3 points. Find his score for his fifth game.
(a)
Total score of first 4 games
= 103 + 168 + 111 + 176
= 558
Average score of first 4 games
= 558 ÷ 4
= 139.5
(b)
Average score of 5 games
= 139.5 + 4.3
= 143.8
Total score of 5 games
= 5 x 143.8
= 719
Score of David's fifth game
= 719 - 558
= 161
Answer(s): (a) 139.5; (b) 161