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In how many ways can three digits out of five distinct numbers 3, 4, 5
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16 Aug 2023, 02:44
16 Aug 2023, 02:44
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30% (02:59) correct
70% (02:46) wrong based on 10 sessions
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In how many ways can three digits out of five distinct numbers 3, 4, 5, 6 and 7 be arranged in a straight line such that ‘3’ and ‘4’ are not next to each other?
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48
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Re: In how many ways can three digits out of five distinct numbers 3, 4, 5
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24 Aug 2023, 00:39
24 Aug 2023, 00:39
1
Arrange 3 numbers out of 5 in 5*4*3 = 60 ways
and arrange 3 numbers out of 5 such that 3 and 4 are there and together in 3*2!*2 = 12 ways
Required number of cases = 60 - 12 = 48
and arrange 3 numbers out of 5 such that 3 and 4 are there and together in 3*2!*2 = 12 ways
Required number of cases = 60 - 12 = 48
Re: In how many ways can three digits out of five distinct numbers 3, 4, 5
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21 Mar 2025, 06:51
21 Mar 2025, 06:51
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