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alphonsa
Joined: 22 Jul 2014
Last visit: 25 Oct 2020
Posts: 106
Given Kudos: 197
Concentration: General Management, Finance
Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
WE:Engineering (Energy)
Products:
Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
Posts: 106
14 Sep 2014, 08:11
Kudos
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
60% (02:43) correct
40%
(02:36)
wrong
based on 72
sessions
History
Date
Time
Result
Not Attempted Yet
The probability of a team winning a match given Matt is playing the match is 0.75. The probability of the team winning a match given Matt is not playing the match is 0.5. The probability of Matt playing any match is 0.8.
If it is known that the team has won the last match, what is the probability that Matt played the match?
A) 0.8321
B) 0.7
C) 0.8571
D) 0.7531
E) 0.8213
Source: 4Gmat
Please explain. I am stuck
If it is known that the team has won the last match, what is the probability that Matt played the match?
A) 0.8321
B) 0.7
C) 0.8571
D) 0.7531
E) 0.8213
Source: 4Gmat
Please explain. I am stuck
14 Sep 2014, 16:54
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alphonsa
This is NOT a GMAT question.
Out of 100 matches:
Matt is plays in 80 and not plays in 20.
Out of 80 matches Matt plays in, team wins 0.75*80 = 60.
Out of 20 matches Matt does not play in, team wins 0.5*20 = 10.
So, out of 100 matches 60 + 10 = 70 are won.
It is known that the team has won the last match. Out of 70 matches won, Matt is in 60: 60/70 = 0.8571...
Answer: C.
TOPIC IS LOCKED.
06 Apr 2016, 02:01
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