Question

Exit A five-sided solid has the numbers 1, 2, 3, 4, and 5. What is the probability of rolling two five-sided number solids and getting a sum of either a 3 or an 8?

Answer 1

To get a sum of 3, you must roll a 1 and a 2. To get a sum of 8, you must roll a 5 and 3, or two 4's.
There are two ways of rolling a 1 and a 2, two ways of rolling a 5 and a 3, and one way to roll two 4's.
There are
`5^2=25` possible outcomes when rolling two such solids.

So the probability of getting a sum of 3 or 8 is
`(2+2+1)/(25)=\frac15`