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In Ghazals doll collection, 3/5 of the dolls are Barbie dolls,
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26 Oct 2023, 01:18
26 Oct 2023, 01:18
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Question Stats:
88% (02:02) correct
11% (00:10) wrong based on 9 sessions
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In Ghazal’s doll collection, \((\frac{3}{5})^{th}\) of the dolls are Barbie dolls, and \((\frac{4}{7})^{th}\) of the Barbies were purchased before the age of 10. If 90 dolls in Ghazal’s collection are Barbies that were purchased at the age of 10 or later, how many dolls in her collection are non-Barbie dolls?
(A) 70
(B) 90
(C) 140
(D) 154
(E) 192
(A) 70
(B) 90
(C) 140
(D) 154
(E) 192
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In Ghazals doll collection, 3/5 of the dolls are Barbie dolls,
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02 Dec 2023, 16:25
02 Dec 2023, 16:25
1
If x = total number of all the dolls in Ghazal's collection,
\(90 = \frac{3}{5}x * (1-\frac{4}{7})\)
\(x = 350\)
However, it's asking for the number of all the non-Barbie dolls, which is
\(= 350 * (1-\frac{3}{5}) = 140\)
\(90 = \frac{3}{5}x * (1-\frac{4}{7})\)
\(x = 350\)
However, it's asking for the number of all the non-Barbie dolls, which is
\(= 350 * (1-\frac{3}{5}) = 140\)
gmatclubot
In Ghazals doll collection, 3/5 of the dolls are Barbie dolls, [#permalink]
02 Dec 2023, 16:25
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