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11 Feb 2019, 02:59
Kudos
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
74% (01:11) correct
26%
(01:16)
wrong
based on 78
sessions
History
Date
Time
Result
Not Attempted Yet
A candy machine contains gumballs: three blue, two red, seven yellow, and one purple. The machine distributes one gumball for each dime. A child has exactly two dimes with which she will purchase two gumballs. What is the probability that the child will get two red gumballs?
(A) 2/169
(B) 1/13
(C) 2/13
(D) 1/156
(E) 1/78
(A) 2/169
(B) 1/13
(C) 2/13
(D) 1/156
(E) 1/78
Given 3 Blue, 2 Red , 7 Yellow and 1 purple
total =13
Exactly 2 red only 1 way
p(a)=1/13C2=1/78
total =13
Exactly 2 red only 1 way
p(a)=1/13C2=1/78
Archit3110
Major Poster
11 Feb 2019, 03:17
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Bookmarks
Bunuel
total = 13
red = 2
1 st dime = 2/13 ; 2nd dime = 1/12
so
1/78
IMO E
