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17 Mar 2022, 06:15
Kudos
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A
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Difficulty:
5%
(low)
Question Stats:
89% (01:19) correct
11%
(00:52)
wrong
based on 63
sessions
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Jaime has n comic books. He sells one half of them and then gives one third of the ones he has left to a friend. If he has 10 comic books left, how many did he have originally?
A. 30
B. 40
C. 60
D. 80
E. 90
A. 30
B. 40
C. 60
D. 80
E. 90
17 Mar 2022, 06:58
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Bookmarks
Total = n
Sells \(\frac{1}{2}\) , then remaining = \(\frac{n}{2}\)
Gives one third of the remaining = \(\frac{n}{2}*\frac{1}{3} = \frac{n}{6}\)
Remaining = \(\frac{n}{2} - \frac{n}{6} = \frac{3n-n}{6} = \frac{2n}{6} = \frac{n}{3}\)
\(\frac{n}{3}\) = 10
n=30
Answer A
Sells \(\frac{1}{2}\) , then remaining = \(\frac{n}{2}\)
Gives one third of the remaining = \(\frac{n}{2}*\frac{1}{3} = \frac{n}{6}\)
Remaining = \(\frac{n}{2} - \frac{n}{6} = \frac{3n-n}{6} = \frac{2n}{6} = \frac{n}{3}\)
\(\frac{n}{3}\) = 10
n=30
Answer A
