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salman_09
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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
 one year ago
salman_09 Group Title
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
 one year ago

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

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

salman_09 Group TitleBest ResponseYou've already chosen the best response.0
I don't know answer
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
Let 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
 one year ago
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