A flower shop has 11 red roses, 7 pink roses, 9 white he roses, and 3 yellow roses in stock. One type of rose is randomly selected for a flower arrangement. What is the probability they the selected rose is red or yellow.

7/15

Step-by-step explanation:

Probability of an event is the number of possible outcome divided by the total outcome. It is a ratio. The probability that an event will or will not happen is 1 as those are the only two possibilities.

Given that the flower shop has 11 red roses, 7 pink roses, 9 white he roses, and 3 yellow roses in stock, the total number of flower available

= 11 + 7 + 9 + 3

= 30 flowers

The probability that a rose selected is;

red = 11/30

yellow = 3/30

the probability they the selected rose is red or yellow

= 11/30 + 3/30

= 14/30

= 7/15

7/15

Step-by-step explanation:

11+7+9+3 = 30

11 = red

3=yellow

11+3=14

=14/30

=7/15