Latest TCS Aptitude Question SOLUTION: 3 white chips,7 blue chips,16 green chips,2 chips are drawn from the box in successful what is the probabilty one is blue and other is white? a)7/50 b)8/30 c)7/25d)20/26

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(#M40019991) TCS question Keep an EYE

3 white chips,7 blue chips,16 green chips,2 chips are drawn from the box in successful what is the probabilty one is blue and other is white?
a)7/50 b)8/30 c)7/25d)20/26

Asked In TCS Aditya Sadhukhan (11 years ago)

Unsolved Read Solution (6)

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mohd nazar mubeen  (11 years ago)

one white chips is selected from 3 so 3c1.
one blue chip is selected from 7 so 7c1.
total 2 chips selected out of 26
so (3c1*7c1)/26c2

Is this solution Helpfull? Yes (16) | No (1)  

KUNAL GAURAV  (11 years ago)

Selection of one white chip out of 3 white chips = 3C1
Selection of one blue chip out of 7 blue chips = 7C1
Selection of 2 chips out of 26 chips = 26C2

So,
Probability = (3C1*7C1)/26C2 = 21/325
None of the given answers is correct.

Is this solution Helpfull? Yes (7) | No (2)  

VIKAS SINGH  (11 years ago)

there r 2 possibilties either the chips drawn can be bw(blue,white) r wb(white blue).so for first case prob. will be-
7/26*3/25=21/650.
for sec. case prob will also be 21/650.so total prob will be.
21/325.
so none of the option match so please chake the question because nothing wrong with solution.

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Alok Kumar  (11 years ago)

Probability = (3C1*7C1)/26C2 = 21/325

Is this solution Helpfull? Yes (3) | No (1)  

rahul jha  (11 years ago)

Selection of one white chip in given white chips = 3C1
Selection of one blue chip in given blue chips = 7C1
Selection of 2 chips out of 26 chips = 26C2
so required result ,(3C1*7C1)/26C2 = 21/325

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MUKESH KUMAR  (11 years ago)

# of ways to succeed: 7*3 = 21
----
# of possible outcomes:26C2 = (26*25)/(1*2) = 325

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Ans: 21/325 = 0.0646
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