### Home > MC2 > Chapter 5 > Lesson 5.2.1 > Problem 5-49

Desmond is rolling a standard six-sided number cube. He plans to roll it

About how many times would you expect Desmond to roll a

? Why? On a six sided dice, if six possible outcomes are equally likely, what is the probability that you will roll a

? If you multiplied this probability by the total number of rolls,

, how many rolls would you expect Desmond to roll a ? About

times.

Be sure to know why this is the answer.About how many times would you expect him to roll an even number? Why?

On a six sided dice, half of the numbers:

and are even. If three numbers out of six are even, what would the probability of rolling an even number be? Multiply this number by the

rolls to find the expected number of rolls that would be even. Desmond kept track of his results for all

rolls. The chart below shows some of his results. Result

Number of

outcomes

Based on his partial results, how many times did he roll aor a ? If the total number of rolls is

, and of the rolls resulted in the numbers , how many times must Desmond have rolled or ? times

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