Question 281597
The average of 11 numbers is 21 . The average of seven of those numbers is 25. What is the average of the remaining four numbers?
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average = sum/(# of elements)
--> sum = n*average
sum1 = 11*21 = 231
sum2 = 7*25 = 175
------------------- Subtract
4 numbers total 56
Their avg = 56/4 = 14