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1 answer:
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Combinations
nCr
you have n items and how many ways are there to chose r of them
nCr=
remember than n! means n times all numbers before like
3!=3*2*1, 5!=5*4*3*2*1
9 stations, how many ways are there to chose 6 of them
9C6=
=
=
=
=
=
84
84 ways
nCr
you have n items and how many ways are there to chose r of them
nCr=
remember than n! means n times all numbers before like
3!=3*2*1, 5!=5*4*3*2*1
9 stations, how many ways are there to chose 6 of them
9C6=
84
84 ways
Answer:
11
Step-by-step explanation:
is very easy and nohard
