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Quiz
PROBABILITY MCQ PART 1
1.
In a single throw of three dice determine the probability of getting (i) a total of 5 (ii) a total of atmost 5 (iii) a total of atleast 5
1/36;5/108;53/54
1/35;6/108;52/54
1/34;7/108;51/54
None
2.
A committee of 4 students is selected at random from a group consisting of 8 boys and 4 girls. Given that there is atleast one girl in committee, calculate the prob. That there are exactly 2 girls in the committee.
178/425
168/425
158/425
None
3.
If P(A)=5/7 , P(B)=3/7 and P (AUB)=6/7 then find (i) P (π¨βπ©)and (ii) P (B/A)
2/8;2/7
2/7;2/5
2/5;2/7
2/7;2/8
4.
in a school, there are 1000 students, out of which 430 are girls, it is known that out of 430, 10% of girls study in class XII what is prob that a student choosen randomly studies in class XII, Given that choosen student is a girl?
0.1
0.2
0.3
0.4
5.
A dice is thrown three times, Events A and B are defined as below: A:- 4 on the third throw B:- 6 on the first and 5 on the second throw Find the prob of A given that B already occurred.
3/6
2/6
1/6
4/6
6.
A Dice is thrown twice and sum of the numbers appearing is obtained to be 6. What is the conditional probability that the no. 4 has appeared at least once?
1/5
2/5
3/5
4/5
7.
Given that two numbers app. on throwing two dice are diff. Find the prob of the event βthe sum of numbers on dice is 4.
1/15
3/15
6/15
9/15
8.
An instructor has a question bank of 300 easy T/F questions 200 difficult T/F questions, 500 easy MCQ and 400 diffi MCQ. If a question is selected at random from the question bank, what is the prob. That it will be an easy question given that it is MCQ.
3/9
5/9
7/9
9/9
9.
If P(A) =1/2 P(B)=0, then P(A/B)=
0
1/2
Not defined
1
10.
A and B are events S.t P(A/B)=P(B/A) then
AβB but Aβ π©
A=B
π¨βπ© = π
P(A)=P(B)
Answers
1 -> A
2 -> B
3 -> B
4 -> A
5 -> C
6 -> B
7 -> A
8 -> B
9 -> C
10 -> D