Question

Out of 28 students in a class, 7 have blue eyes. What is the probability a student picked at random from the class does NOT have blue eyes?


A) 1/4

B) 3/4

C) 1/7

D) 6/7

Answer 1

3/4 because 1/4 of the class has blue eyes, so the other 3/4 don't.

Answer 2

there are 28 total and 7 have blue eyes meaning the probability of picking so.eone with blue eyes is
$\frac{7}{28} = \frac{1}{4}$
so the probability of pi king someone without blue eyes is the entire sample minus the probability of blue eyes so
$1 - \frac{1}{4} = \frac{4}{4} - \frac{1}{4} = \frac{3}{4}$
so there is 75% chance of picking someone without blue eyes.

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