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John bought 5 books with an average (arithmetic mean) price
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15 Oct 2019, 16:36
15 Oct 2019, 16:36
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Question Stats:
100% (00:25) correct
0% (00:00) wrong based on 11 sessions
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John bought 5 books with an average (arithmetic mean) price of $12. If John then buys another book with a price of $18, what is the average price of all 6 books?
(A) $12.50
(B) $13
(C) $13.50
(D) $14
(E) $15
(A) $12.50
(B) $13
(C) $13.50
(D) $14
(E) $15
Re: John bought 5 books with an average (arithmetic mean) price
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15 Oct 2019, 21:35
15 Oct 2019, 21:35
1
Option B
Re: John bought 5 books with an average (arithmetic mean) price
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15 Oct 2019, 21:36
15 Oct 2019, 21:36
1
We know that Avg = (PriceOf5Books + 6thBookPrice)/6 = (12*5 + 18)/6 = 13
