Answer:
The correct answer is last option
5/7
Explanation:
It is given that, eight white balls and twenty black balls are in a bag
To find the probability
From the above data we get,
number of white balls = 8
Number of black balls = 20
total number of balls = 8 + 20 = 28
Probability of getting black ball = number of black ball/Total number of balls
= 20/28 = 5/7
The correct answer is last option
5/7