there are 10 students in the class. two th them should be selected as the best students in the class. how many different ways can be done

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05-12-2022
Mathematics

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there are 10 students in the class. two th them should be selected as the best students in the class. how many different ways can be done

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PallaviB PallaviB · Answer 1 · 2022-12-07T18:39:27+01:00

There are 45 different ways in which two of them can be selected as the best students in the class.

A combination in mathematics is a choice made from a group of separate elements where the order of the selection is irrelevant (unlike permutations).

A k-combination of a set S is officially defined as a subset of S's k unique elements.

Total number of students = 10

Number of students to be selected = 2

No. of ways = 10C2

= (10*9)/2

= 5*9

= 45

Hence, there are 45 different ways in which two of them can be selected as the best students in the class.

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