Question

You roll a standard number cube. Find P(3 or 4).

Answer 1

p = 1/6 + 1/6 = 2/6 = 1/3

Answer 2

`(1)/(3)`

Explanation:

Total number of events on dice = {1,2,3,4,5,6}=6

Favorable event = {3}=1

So, probability of getting 3 on dice =
`\frac{\text{Favorable events }}{\text{Total events}}`

=
`(1)/(6)`

Favorable event = {4}=1

So, probability of getting 4 on dice =
`\frac{\text{Favorable events }}{\text{Total events}}`

=
`(1)/(6)`

So, probability of getting 3 or 4 on a dice =
`(1)/(6)+(1)/(6)`

=
`(2)/(6)`

=
`(1)/(3)`

Hence P(3 or 4) is
`(1)/(3)`