Question

In a school, 20% of the students have blue eyes. Find the

experimental probability that in a group of 4 students,
at least one of them has blue eyes.
The problem has been simulated by generating random
numbers. The digits 0-9 were used. Let numbers "4" and
"5" represent the 20% of students with blue eyes. A
sample of 20 random numbers is shown.
2546 1390 6075
7359
3048
5621
9732
6173
1430
7918 7910
1230 2386 0793
2816 6147
5978
9436 3806 5971

Answer 1

9/20 or 45%

Explanation:

Each random number has four digits, representing four students. We want to count how many have a 4 or a 5, which represents students with blue eyes.

Of the 20 random numbers, 9 have at least one 4 or 5.

2546, 6075, 7359, 5621, 1430, 6147, 5978, 9436, 5971

So the experimental probability is 9/20, or 45%.