#averageofdata
Total height of the other 3 children
546 - 150 = 396 cm
Average height of the other 3 chidren
396 `-:` 3 = 132 cm
#averageofdata
Total cost
42.50 `xx` 4 = $170
Cost of two children
170 - 50 - 60 = $60
Cost of each child (Kids' Dash)
60 `-:` 2 = $30
#averageofdata
4 `xx` 10 + 5 `xx` 15
40 + 75 = 115
Total hours
5 `xx` 30 = 150
Total hourse in the 7- hour group
150 - 115 = 35
The missing number is
35 `-:` 5 = 7
#averageofdata
Total length of 3 sticks
3 `xx` 6 = 18cm
Length of stick C
18 - 9 = 9 m
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