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 one year ago
An orchestra consists of 25 members. The youngest member is 32 years old. She leaves and is replaced by a new member who is 30 years old.
By how much does the replacement change the average age of the members of the orchestra?
 one year ago
An orchestra consists of 25 members. The youngest member is 32 years old. She leaves and is replaced by a new member who is 30 years old. By how much does the replacement change the average age of the members of the orchestra?

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samhussain
 one year ago
Best ResponseYou've already chosen the best response.0hw did you get this answer

samhussain
 one year ago
Best ResponseYou've already chosen the best response.0someone can explain this

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0Let A = old average and B = new average The old average was found by dividing the sum of the ages S by 25 to get S/25 = A The new average is found by subtracting 32 from that sum S and adding in 30. Then you still divide by 25 (since you still have 25 people) (S32+30)/25 = B (S2)/25 = B S/252/25 = B A2/25 = B B = A  2/25 B = A  0.08 So B = A  0.08 which shows us that the average age decreased by 0.08 years
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