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mujtaba4iit (501)

Blazing goIITian

Olaaa!! Perrrfect answer. 83  [126 rates]

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total posts: 332    
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See the working now, if u didn't get.

(5C3 x 5C1) + (5C2 x  5C2) + (5C1 x 5C3) + (5C2 x 5C1) + (5C1 x 5C2) + (5C3 + 5C3)=
50 + 100 + 50 + 50 + 50 + 10 + 10 =320

I haven't shown 5C0 and 1C1 in the working.
I hope its useful and understandable.

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 this reply: 7 points  (with Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
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