Question

Suppose you roll two 8 sided dice.

a.) What is the probability of rolling a sum of 4?

b.) What is the probability of rolling a pair of ones?

c.) What is the probability of rolling two odd numbers?


Can anyone help me?

Answer 1

Explanation:

A)

You can roll a four in the following 3 ways

2 2

1 3

3 1

If the dice are fair and you can roll any one of 8 numbers then the the total number of ways that you can roll 2 eight sided dice is 8 * 8 = 64

Answer 3/64 or 0.0469

B)

You can roll a pair of ones only 1 way.

1/64 = 0.015625

C )

The odd numbers are 1 3 5 7

so you can get two odd numbers 1/2 * 1/2 = 1/4 and that's the answer to C.