Answer:
The probability that the selected marble is small or green is 0.53
Step-by-step explanation:
The probability that the selected marble is small or green is:
the probability that it is small plus the probability that it is green, minus the probabililty that it is small and green
Probability that it is small is:
12/(12+14)
= 12/26
= 6/13
Probability that it is green is:
(10+7)/26
= 17/26
Probability that it is small and green is:
(12 - 5)/12
= 7/12
The probability that the selected marble is small or green is:
6/13 + 17/26 - 7/12
= 0.53