Latest Exam Aptitude Question SOLUTION: Find the no. of ways you can fill a 3X3 grid(with four corner defined as a,b,c,d). if you have 3white balls and 6 black bolls.

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(#M40034522) EXAM Numerical Ability question Keep an EYE

Find the no. of ways you can fill a 3X3 grid(with four corner defined as a,b,c,d). if you have 3white balls and 6 black bolls.

Asked In Exam Aashu (10 years ago)

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RAKESH  (10 years ago)

3 white marbles can be placed in (3*3=9) grids in 9C3 ways & rest 6 marbles will be automatically filled
so, no. of ways = 9C3

if we start with black marbles then 6 black marbles can be filled in 9C6 ways & rest 3 will be automatically filled

so, no. of ways = 9C6

ans: 9C3=9C6=84

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