A box contains 15 yellow, 5 orange, and 15 green tennis balls. If Izzy draws a tennis ball at random out of the box what is the probability that she drew either a green or an orange tennis ball?

P (green or orange) = 4/7

Step-by-step explanation:

We need to know how many tennis balls there are

total = 15 yellow + 5 orange + 15 green

= 35 balls

Probability of green or orange tennis ball is the sum of the green and orange tennis balls over the total balls

P (green or orange) = (green + orange) / total

= (15+5) / 35

=20/35

=4/7