Probability of red or green card = 3/5
Step-by-step explanation:
Number of red cards = 3
Number of blue cards = 6
Number of green cards = 6
Total number of cards = 6 + 6 + 3 = 15
Probability of red or green card = Probability of red card + Probability of green card
Probability of red card = number of red cards/total number of cards
Probability of red card = 3/15
Probability of green card = number of green cards/total number of cards
Probability of green card = 6/15
Probability of red or green card = 3/15 + 6/15
Probability of red or green card = 9/15
In simplest term:
Probability of red or green card = 3/5