∵ Total no. of favourable cases i,e., (5, 10, 15, 20, 25, 30, ....., 105, 110, 115, 120) = 24.
∴ Reqd . Prob = 24/120 = 1/5

Correct Option: A

∵ Total no. of favourable cases i,e., (5, 10, 15, 20, 25, 30, ....., 105, 110, 115, 120) = 24.
∴ Reqd . Prob = 24/120 = 1/5

No of white balls = 7
Total no. of balls = 7 + 9 = 16

Correct Option: D

No of white balls = 7
Red balls = 9
Total no. of balls = 7 + 9 = 16
Probability of drawing a white ball = 7/16

Total ways = 52
There is one queen of club and one king of heart favourable ways = 1 + 1 = 2.

Correct Option: B

Total ways = 52
There is one queen of club and one king of heart favourable ways = 1 + 1 = 2.
∴ Required probability = 2/52 = 1/26

Here, n(5) = {a, e, i,o, u}
and E = Event of selecting the vowel i = {i}

Correct Option: C

Here, n(5) = {a, e, i,o, u}
and E = Event of selecting the vowel i = {i}
∴ P(E)= n(E)/n(S) = 1/5

Required probability = P(A) x P(B)

Correct Option: B

Required probability = P(A) x P(B)
= (7/8) x (9/10)
= 63/80