if there are 11 people and only 4 chairs are are available, in how many ways can they be seated?
a. 1,720
b, 2,640
c. 5, 540
d. 7,920
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if there are 11 people and only 4 chairs are are available, in how many ways can they be seated?
a. 1,720
b, 2,640
c. 5, 540
d. 7,920
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Answer:
D. 7, 920
Step-by-step explanation:
n=11
r=4
P(11,4)=11/(11-4)
P(11,4)=(11×10×9×8×7)/7
P(11,4)=11×10×9×8
P(11,4)=7920.
7920 is the answer