Total number of cards n(S) = 52
Number of red cards n(E) = 26
∴ P(E) = n(E)/n(S)

Correct Option: D

Total number of cards n(S) = 52
Number of red cards n(E) = 26
∴ P(E) = n(E)/n(S) = 26/52 = 1/2

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

Total number of letters = n(S) = 11
whereas, number of vowels = n(E) = 4
∴ Required probability = n(E)/n(s)

Correct Option: B

Total number of letters = n(S) = 11
whereas, number of vowels = n(E) = 4
∴ Required probability = n(E)/n(s) = 4/11

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