Team of four students is to be selected from a total of 12 students for a quiz competition. In how many ways it can be selected if three particular students should be included and one particular student doesn't want to be in the team.

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Solution

The correct option is A
8

Let particular four students are A, B, C and D.

A, B and C are selected D is not selected.

Select 1 from reaming 12 -4 = 8

Number of ways = $^{8} C_{1}$ = 8

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12

students. The total number of ways in which the team can be selected such that two particular students refuse to be together and other two particular students wish to be together only is equal to

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Team of four students is to be selected from a total of 12 students for a quiz competition. In how many ways it can be selected if three particular students should be included and one particular student doesn't want to be in the team.

The correct option is A 8 Let particular four students are A, B, C and D. A, B and C are selected D is not selected. Select 1 from reaming 12 -4 = 8 Number of ways = 8C1 = 8

The correct option is A
8

Let particular four students are A, B, C and D.

A, B and C are selected D is not selected.

Select 1 from reaming 12 -4 = 8

Number of ways = $^{8} C_{1}$ = 8