Answer:
0.16
Explanation:
24 boys + 18 girls + 8 adults = 50 people
Out of sample of 50 people he counted, 8 were adults. Hence, the percentage of adults is:
(equal to 16%)
"Assuming the distribution is same for the 650 people in the auditorium, the percentage (or probability) or chosing an adult will be the same"
So, the answer is 0.16