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# A box contains 90 balls of different colours: 13 yellow, 19

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VP
Joined: 20 Jul 2017
Posts: 1256
Location: India
Concentration: Entrepreneurship, Marketing
WE: Education (Education)
A box contains 90 balls of different colours: 13 yellow, 19  [#permalink]

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09 Dec 2019, 09:33
5
00:00

Difficulty:

65% (hard)

Question Stats:

50% (02:04) correct 50% (01:36) wrong based on 22 sessions

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A box contains 90 balls of different colours: 13 yellow, 19 green, 27 red, 10 black, 7 brown and 14 white. Find the smallest number V such that any V balls drawn from the box will contain at least 14 balls of the same colour.

A. 14
B. 20
C. 70
D. 72
E. 76

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Manager
Joined: 25 Nov 2019
Posts: 50
Re: A box contains 90 balls of different colours: 13 yellow, 19  [#permalink]

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09 Dec 2019, 16:13
You must add all balls less than 14 then 13 for every group over 14 and 1 more will guarantee 14
10+7+13+13+13+13+1=70

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Re: A box contains 90 balls of different colours: 13 yellow, 19   [#permalink] 09 Dec 2019, 16:13
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