Probability  MCQs

MCQs of Probability

Showing 21 to 30 out of 73 Questions
1 2 3 4 5 6
21.
Two unbiased coins are tossed. If one coin shows head, the probability that the other also show head is_____
(a) 14
(b) 12
(c) 18
(d) 1
Answer:

Option (b)

22.
A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of success is_____
(a) 83
(b) 38
(c) 45
(d) 54
Answer:

Option (d)

23.
The probability that a student is not a swimmer is 45. The probability that out of 5 students exactly 4 are swimmers is _____
(a) 153
(b) 4 154
(c) C45 154
(d) 454
Answer:

Option (b)

24.
If parameters of a binomial distribution are n=5 and p=0.30, then the mean is _____ and variance is_____
(a) 1.5,1.5
(b) 1.5,1.05
(c) 1.5,1.40
(d) 1.5,1.15
Answer:

Option (b)

25.
If A and B are two events such that P(A) ≠ 0 and P(B) ≠ 0 then PA'B' =_____
(a) 1-PAB
(b) 1-PA'B
(c) 1-P(A∪B)P(B')
(d) P(A')P(B')
Answer:

Option (c)

26.
If A and B are two events such that P(A)=13, P(B)= 14 and P(A∩B)=15 then PA'B' =______
(a) 3740
(b) 3745
(c) 2340
(d) 845
Answer:

Option (b)

27.
If 4P(A) = 6P(B) = 10P(A∩B) =1 then PBA =_____
(a) 25
(b) 35
(c) 710
(d) 1960
Answer:

Option (a)

28.
Three fair coins are tossed. If one of shows tail,then the probability that all three coins shows tail, is _____
(a) 17
(b) 18
(c) 27
(d) 16
Answer:

Option (a)

29.
The mean of binomial distribution 10x25x3510-x ,x=0,1,2,....., 10 is _____ .
(a) 4
(b) 5
(c) 6
(d) 10
Answer:

Option (a)

30.
If A and B are two events such that P(A) ≠ 0 and PBA =1 then_____
(a) A⊂B
(b) B⊂A
(c) B=ϕ
(d) A=ϕ
Answer:

Option (a)

Showing 21 to 30 out of 73 Questions
1 2 3 4 5 6