Q194
There are 20 balls in a bag which are numbered 1, 2, 3 . . . . . 20. Find the probability that the number marked on the ball taken out of the bag is divisible by 3 or 5.
A.
B.
Answer
C.
D.
Answer: Option B
Solution
Answer: Option B
Solution:
Number divisible by 3 = 6Number divisible by 5 = 4
Number divisible by 3 or 5 = 1
Total number = 6 + 4 - 1 = 9
Probability =