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# Assume that at a particular zoo, 2/5 of all the animals are mammals

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Math Expert
Joined: 02 Sep 2009
Posts: 58335
Assume that at a particular zoo, 2/5 of all the animals are mammals  [#permalink]

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31 Oct 2018, 02:14
00:00

Difficulty:

45% (medium)

Question Stats:

65% (01:47) correct 35% (02:17) wrong based on 36 sessions

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Assume that at a particular zoo, 2/5 of all the animals are mammals, and 2/3 of the mammals are allowed to interact directly with the public. If 24 mammals are allowed to interact directly with the public, how many animals in this zoo are NOT mammals?

A. 36
B. 48
C. 54
D. 60
E. 72

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Location: India
Concentration: Finance, Marketing
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Re: Assume that at a particular zoo, 2/5 of all the animals are mammals  [#permalink]

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31 Oct 2018, 02:19
The number of mammals = 2/5.
Number of mammals allowed to interact = 2/3*2/5 = 4/15 Of total animals

Given 4/15X = 24. Then total animals = 15*6 = 90 animals.

Not mammals = 3/5*90 = 54 animals.

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Re: Assume that at a particular zoo, 2/5 of all the animals are mammals   [#permalink] 31 Oct 2018, 02:19
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