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There are 7 bags and 7 balls out of which 3 balls are identical. In h
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29 Oct 2024, 01:13
29 Oct 2024, 01:13
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There are 7 bags and 7 balls out of which 3 balls are identical. In how many ways can these 7 balls be put inside the 7 bags, such that no bag is left empty?
A. 420
B. 600
C. 840
D. 900
E. 1140
A. 420
B. 600
C. 840
D. 900
E. 1140
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Re: There are 7 bags and 7 balls out of which 3 balls are identical. In h
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29 Oct 2024, 08:50
29 Oct 2024, 08:50
1
total ways to distribute 7 unique balls = 7!
since 3 balls are identical, we divide by 3!
7!/3! = 840
Hence, C
since 3 balls are identical, we divide by 3!
7!/3! = 840
Hence, C
gmatclubot
Re: There are 7 bags and 7 balls out of which 3 balls are identical. In h [#permalink]
29 Oct 2024, 08:50
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