Asked by jazzy

A number cube has sides labeled 1 to 6.
Hannah rolls the number cube 18 times.
How many times can she expect to roll a
number less than 3?
A2 C6
B3 D8

Answers

The expected value is the number of rolls multiplied by the probability of each success on the roll (as success is the top face of the die is a 2 or a 1) and the probability of that success is 2/6 which reduces to 1/3
So the expected value in 18 rolls
= 18 x 1/3
Answered by shumera
the answer is A
Answered by NILSOJ
the answer is 6 or C I had the same exact question and I got it right.
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