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Question
The number of ways of selecting 10 balls from unlimited number of red, black, white and green balls is , it is given that balls of same colours are identical
The number of ways of selecting 10 balls from unlimited number of red, black, white and green balls is , it is given that balls of same colours are identical
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Solution
The correct option is A 286
No. of red balls=n(B)=n(W)=n(G)=10ballsNo. of ways of selecting 10=x1+x2+x3+x4=10=10+4−1C4−1=13C3=286
No. of red balls=n(B)=n(W)=n(G)=10balls
No. of ways of selecting 10=x1+x2+x3+x4=10=10+4−1C4−1=13C3=286
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