If the probability of rain on any given day in Pune city is 50 % then what is the Probability that it rains on exactly 3 days in a 5 - day period ?A.8/125 B.5/16 C.8/25 D.2/25
If the probability of rain on any given day in Pune city is 50 % then what is the Probability that it rains on exactly 3 days in a 5 - day period ?
A.8/125
B.5/16
C.8/25
D.2/25
B.5/16
C.8/25
D.2/25
It is 5/16.
5c3. (1/2^5) = 10/32 = 5/16
Btw you'll find answers to doubts a lot quicker in the quant forum
http://www.pagalguy.com/forums/quantitative-ability-and-di/official-quant-thread-c-t-88456/p-3611604?page=438
@manali16
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but those books are really confusing and deviated from the actual CAT questions.i dont have a pc too. so i cant refer any online materials. i spend 4 hours daily for preparing CAT. my friend advised me that 4 hours of such preparations=1 hour of preparation by using standard materials like TIME,IMS. i went to TIME and ask them whether i can get the materials alone for a cheaper price. they said they will provide material only along with a course. and that course costs 20000! i was heart broken! i desperately need some standard books. i would be greatly thankful if someone is will to donate extra materials or old materials! PG is my only hope. so please help me! thank you all
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