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# A jar contains 30 marbles, of which 10 are red, 10 are blue,

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BSchool Forum Moderator
Joined: 29 Jan 2015
Posts: 1468
Location: India
WE: General Management (Non-Profit and Government)
A jar contains 30 marbles, of which 10 are red, 10 are blue,  [#permalink]

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23 Nov 2019, 06:31
3
00:00

Difficulty:

35% (medium)

Question Stats:

69% (02:02) correct 31% (02:56) wrong based on 13 sessions

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A jar contains 30 marbles, of which 10 are red, 10 are blue, 5 are green and the rest are yellow. If 2 marbles are to be selected at random from the jar, one at a time without being replaced, what is the approximate probability that two marble selected will be with the same color?

(A) 1/15

(B) 1/5

(C) 1/3

(D) 1/4

(E) 1/2
Senior Manager
Joined: 29 Jun 2019
Posts: 470
Re: A jar contains 30 marbles, of which 10 are red, 10 are blue,  [#permalink]

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23 Nov 2019, 09:38
(10/30 × 9/29)×2 +(5/30 ×4/29)×2= 40/87
Which is approximatelly 1/4
Option D

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Re: A jar contains 30 marbles, of which 10 are red, 10 are blue,   [#permalink] 23 Nov 2019, 09:38
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