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In how many ways can 6 subjects be selected from…

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MATHS

In how many ways can 6 subjects be selected from 10 subjects for an examination?

  • A. 218
  • B. 216
  • C. 215
  • D. 210

QUICK ANSWER…

D

SOLUTION 

Please observe that this problem did not require we do the selection in a specific order,

Hence:

In how many ways can 6 subjects be selected from 10 subjects for an examination?

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is incorrect.
  3. C is incorrect.
  4. D is the correct answer.

QUICK TIPS…

You may please note these/this:

  • Selecting a few numbers out of many numbers requires permutation or combination depending on if the order of selection is under consideration or not.
  • When the order of selection is under consideration, permutation will be done, but when the order of selection does not matter, combination will be done.

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/ culled from 2018 JAMB-UTME mathematics question 26 /

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