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anonymous
 3 years 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?
anonymous
 3 years 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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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0hw did you get this answer

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0someone can explain this

jim_thompson5910
 3 years 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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