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In how many ways can 2 students be selected from a…

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MATHS

In how many ways can 2 students be selected from a group of 5 students in a debating competition?

A. 25 ways

B. 10 ways

C. 15 ways

D. 20 ways

QUICK ANSWER…

B

DETAILS…

The number of ways in which 2 students can be selected from a group of 5 students in a debating competition is 10.

Recall that:

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rearrangement = permutation, while

selection = combination.

2 students can be selected from 5 students in ⁵C₂ = 10 ways

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is correct.
  3. C is not correct.
  4. D is not the correct answer.

KEY-POINTS…

You may please note these/this:

In mathematical permutation and combination topics,

  • Selection = combination.
  • Rearrangement = permutation.

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/ culled from 2021 JAMB-UTME MATHEMATICS question 2 /

1 Answers

  1. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Selection or choice = combination.

    Admin - Mar 27, 2022 | Reply


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