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WorksheetsIntroduction to Probability
Total questions: 13
Worksheet time: 7mins
If we throw two dice simultaneously, what would be the probability that we get a 10 or 11?
5/36
5/12
1/3
None of these
The probability of an impossible event is
0
1
Infinity
None of these
If A and B are two independent events, what is P(A∩B), given that P(A)=0.5 and P(B)=0.3?
0.8
0.15
0.2
None of these
If E and F are two mutually exclusive events, what is P(E⋃F) given that P(E)=0.25 and P(F)=0.4?
0.65
0.1
0.55
none of these
For any Certain Event, the probability is
1
greater than 1
0
Infinity
If A and B are disjoint events, then it must be that
P(A∩B)=0
P(A)=0 and P(B)=0
P(A or B)=0
P(A̅) = P(B)
If a fair coin is tossed 5 times repeatedly, what would be the size of the sample space?
16
10
32
none of these
If A and B are independent events, then it must be that
A̅ and B are independent events
A and B̅ are independent events
A̅ and B̅ are independent events
All of these
Two persons X and Y appear in an interview for two vacancies in the same post. The probability of X's selection is 1/5 and that of Y's selection is 1/3. The probability that none of them will be selected is :
7/15
8/15
9/15
10/15
If P(A)=0.3, P(B)=0.2 and P(C)=0.1 and A, B and C are independent events, find the probability of occurrence of at least one of the three events A, B and C?
0.496
0.092
0.6
none of these
In A, B and C are mutually exclusive and exhaustive events, then
P(A⋂B⋂C) = 0
P(A⋃B⋃C) = 1
P(A⋂B) = 0,
P(B⋂C) = 0,
P(C⋂A) = 0
All of these will hold
Let A and B be two events such that P(A) =½, P(B)=⅓ and P(A⋂B)=¼ , then P(A|B) is
3/4
7/12
1/2
5/12
Which of the following are axioms of probability?
For any event A, P(A) ≥ 0
Probability of the sample space is 1
If A1, A2, ..... An are disjoint events of S, then Σ P(Ai) = P (S)
All of these
