Need ! 80 points! (sike)
at the airport, ten people are waiting on standby. two seats b...
Mathematics, 02.11.2019 10:31 durham953
Need ! 80 points! (sike)
at the airport, ten people are waiting on standby. two seats become available, one first class and one coach. how many ways are there to fill the two seats?
a. 10
b. 20
c. 45
d. 90
Answers: 3
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