Question

Catherine has a number cube that has 6 faces that are numbered from 1 through 6. She plans on rolling the number cube 60 times. About how many times should she expect to roll a number that is greater than 4?

Answer 1

20 times or A

Explanation:

Answer 2

20 times

Explanation:

We are given a cube that has s 6 faces that are numbered from 1 through 6.

She expect to roll a number that is greater than 4 .

A number greater than 4 of dice = 5 or 6

Probability of getting 5 =
`\frac{\text{favorable event}}{\text{total events}}`

Favorable event ={5}=1

Total events ={1,2,3,4,5,6}=6

So probability of getting 5 =
`(1)/(6)`

Probability of getting 6 =
`\frac{\text{favorable event}}{\text{total events}}`

Favorable event ={6}=1

Total events ={1,2,3,4,5,6}=6

So probability of getting 6 =
`(1)/(6)`

Thus the probability of getting 5 or 6 =
`(1)/(6)+(1)/(6)`

=
`(2)/(6)`

=
`(1)/(3)`

Since She plans on rolling the number cube 60 times

So,she expect to roll a number that is greater than 4=
`60*(1)/(3)`

=20

Hence she should expect 20 times to roll a number that is greater than 4