Victoria, Zoe, Emma and Levi share the same hobby of collecting coins. The average number of coins collected by the 4 friends is 29. Zoe collected 6 more coins than Emma but 13 fewer coins than Victoria. Levi collected 5 coins fewer than Emma. Find the average number of coins collected by Zoe, Emma and Levi. Round off your answer to the nearest whole number.
Number of coins Emma collected = 1 u
Number of coins Zoe collected = 1 u + 6
Number of coins Victoria collected = 1 u + 6 + 13 = 1 u + 19
Number of coins Levi collected = 1 u - 5

Total number of coins collected
= 4 x 29
= 116

Total number of coins collected in units
= 1 u + 1 u + 6 + 1 u + 19 + 1 u - 5
= 4 u + 20

4 u + 20 = 116
4 u = 116 - 20 = 96

1 u = 96 ÷ 4 = 24

Total number of coins collected by Zoe, Emma and Levi
= 1 u + 6 + 1 u + 1 u - 5
= 3 u + 1
= 3 x 24 + 1
= 73

Average number of coins collected by Zoe, Emma and Levi
= 73 ÷ 3
≈ 24 (Round off to the nearest whole number.)

Answer(s): 24