Hello, NOX Andrew!

You should use Combinations, not Permutations.

1-28. A high school lottery uses two sets of numbered balls.

One set consists of ten white balls numbered 1-10

and the second set contains twenty blue balls numbered 1-20.

To play, you select two white balls and two blue balls.

What is the probability that your lottery ticket contains exactly

one matching white number and two matching blue numbers?

There are: . possible outcomes.

We want one of the two White winners: 2 ways

[color=beige]and both of the two Blue winners: 1 way

Hence, there are 2 ways to have one white winner and two blue winners.

1-29) At a picnic, there was a bowl of chocolate candy that had:

10 pieces each of Milky Way, Almond Joy, Butterfinger, Nestle Crunch,

Snickers, and Kit Kat.

Jen grabbed six pieces at random from this bowl of 60 chocolate candies.

What is the probability that she got one of each variety?

There are: . possible outcomes.

To get one of each, there are: . ways.