Matthew, Hazel, Layla and Benjamin share the same hobby of collecting stickers. The average number of stickers collected by the 4 friends is 29. Hazel collected 8 more stickers than Layla but 15 fewer stickers than Matthew. Benjamin collected 3 stickers fewer than Layla. Find the average number of stickers collected by Hazel, Layla and Benjamin. Round off your answer to the nearest whole number.
Number of stickers Layla collected = 1 u
Number of stickers Hazel collected = 1 u + 8
Number of stickers Matthew collected = 1 u + 8 + 15 = 1 u + 23
Number of stickers Benjamin collected = 1 u - 3

Total number of stickers collected
= 4 x 29
= 116

Total number of stickers collected in units
= 1 u + 1 u + 8 + 1 u + 23 + 1 u - 3
= 4 u + 28

4 u + 28 = 116
4 u = 116 - 28 = 88

1 u = 88 ÷ 4 = 22

Total number of stickers collected by Hazel, Layla and Benjamin
= 1 u + 8 + 1 u + 1 u - 3
= 3 u + 5
= 3 x 22 + 5
= 71

Average number of stickers collected by Hazel, Layla and Benjamin
= 71 ÷ 3
≈ 24 (Round off to the nearest whole number.)

Answer(s): 24