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In this live AMA, Ruthvik shares how he scored a 745 on the GMAT and answers questions from students directly. From the mindset that kept him consistent to the way he approached mocks and managed test-day nerves..
04 Mar 2021, 09:45
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Difficulty:
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Four men and three boys are arranged in a straight line. What is the probability that the men and the boys occupy alternate position?
A. 1/7
B. 1/20
C. 1/30
D. 1/35
E. 1/70
A. 1/7
B. 1/20
C. 1/30
D. 1/35
E. 1/70
04 Mar 2021, 12:51
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Given: Four men and three boys are arranged in a straight line.
Asked: What is the probability that the men and the boys occupy alternate position?
Total number of arrangements = 7!
Favorable number of arrangements so that that the men and the boys occupy alternate position (MBMBMBM) = 4!*3!
Probability = 4!*3!/7! = 1/35
IMO D
Asked: What is the probability that the men and the boys occupy alternate position?
Total number of arrangements = 7!
Favorable number of arrangements so that that the men and the boys occupy alternate position (MBMBMBM) = 4!*3!
Probability = 4!*3!/7! = 1/35
IMO D
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04 Mar 2021, 13:11
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Total arrangements = 7!
If boys and men need to be alternate, the arrangements = 4!*3!
Probability = 4!*3!/7! = 1/35
Posted from my mobile device
If boys and men need to be alternate, the arrangements = 4!*3!
Probability = 4!*3!/7! = 1/35
Posted from my mobile device
