The average of 4 numbers is 48. Three of the numbers are 48, 54, and 56. Find the fourth number.
The average height of 12 students in a class is 150 cm and the average height of the remaining 18
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the average of 4 numbers is 48
the sum of 4 numbers is 48×4=192
the three numbers are 48,54,56
fourth number is 192-(48+54+56)
=192-158
=34
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