Suppose Colby rolls the number cube 100 times. About how many times can she expect to roll a 2?

1 Answer
Aug 11, 2016

About 16 or 17 times.

Explanation:

The probability of throwing any number (like 2)on a die is #1/6#

This means that in 6 throws we would expect to get one 2.

#1/6 xx6 = 1#

In 100 throws we would expect a 2 once in every 6 throws, or one sixth of the throws.

#1/6 xx100 = 16 2/3 = 16.67#

Colby can expect a 2 about 16 or 17 times.