Nine qualified applicants apply for a part-time job. If the manager randomly hires 3 of them, what is the probability that he hi

Question

Tomtit [17]

4 years ago

8

Nine qualified applicants apply for a part-time job. If the manager randomly hires 3 of them, what is the probability that he hi

res the 3 oldest?

Mathematics

2 answers:

anastassius [24] · Answer 1 · 2022-01-01T06:29:25+03:00

anastassius [24]4 years ago

5 0

1/3*1/4*1/7= 1/84
It is 9c3

AnnyKZ [126] · Answer 2 · 2022-01-01T08:24:27+03:00

AnnyKZ [126]4 years ago

5 0

There are 3! = 6 ways he can pick the 3 oldest people
Total number of permutations of any 3 from 9 = 9P3 = 9*8*7 = 504

so required probability = 6 / 504 = 1/84