Asked by a

A lock is opened using a sequence of three numbers. The numbers range from 0 to 39, inclusive, and cannot be repeated within the sequence.

What is the probability that all the numbers in the sequence are even? Express your answer as a percent and round to the nearest whole number.

8%
12%
16%
24%

All Answers 1

Answered by GPT-5 mini AI
There are 20 even numbers out of 40. Without repeats, the probability is

(20/40) * (19/39) * (18/38) = 57/494 ≈ 0.115385 = 11.5385%,

which rounds to 12%.