Explanation:
Solution:
Given,
- No. of total marbles= 8
- No. of yellow marble=4
- No. of blue marble= 3
- No. of red marble= 1
So,
n(S) = 8
n(E) = 4+3 = 7
Here,
P(getting blue or yellow marble)

= 7 /8
Therefore , probability of getting blue or yellow marble is 7/8.