Answer:
Step-by-step explanation:
Combination question
Generally
nCr = n! / (n-r)!r!
The organizer want to select 5 people from 30 people
Then, the total possible selection is
30C5 = 30! / (30-5)!5!
30C5 = 30•29•28•27•26•25!/25! ×5!
30C5 = 17,100,720 /5•4•3•2
30C5 = 142,506 ways
So, there are 142,506 numbers of ways to selected them.
The group of 5 youngest persons of 30 is UNIQUE such group of 5 persons from 30, under given conditions..
if there are exactly 5 youngest people and if they were all selected, the probability is
5 / 142,506 = 0.000035086
