anonymous
  • anonymous
A student is asked to answer 8 out of 11 questions on an exam. (a) Classify the problem as a permutation, a combination, or neither. Combination Neither Permutation (b) In how many ways can she select the questions to be answered?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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amistre64
  • amistre64
there doesnt seem to be more than one group of options involved and it appears to be selection without repetition... I am guessing since its been awhile, but permutation. Would you happen to know the definitions of the words involved?
amistre64
  • amistre64
permutation is is when the order that is picked matters. Combination tends to refer to without order. So this I think is actually leaning towards combination
anonymous
  • anonymous
premutation is a selection of objects from a given set with regard to the order in which they are selected

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amistre64
  • amistre64
so the order to the questions selected is of no importance right?
anonymous
  • anonymous
i guess so
amistre64
  • amistre64
if you are given 10 answers to fill out and you can choose to do any 5 of them, does it matter what order you do it in?
amistre64
  • amistre64
Id go with combination after reading up on the definitions :)
amistre64
  • amistre64
we can write the rest of it in notation: 11! 9*10*11 ----- = -------- 8! 3! 1*2*3
anonymous
  • anonymous
ok, do you possibly know how to do the second half?
amistre64
  • amistre64
or 3*5*11 = 15*11 = 165
amistre64
  • amistre64
let me check that again :)
amistre64
  • amistre64
I wonder if id be different this way: 11! 4.5.6.7.8.9.10.11 ---- = ------------------ = same :) 3! 8! 1.2.3.4.5.6.7.8
amistre64
  • amistre64
If I did it right, and thats a big if these days, the answers 165 ways
anonymous
  • anonymous
ok, thank you for your help.

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