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Published on: 28/08/2019
Probability
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Questions + Answers key
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1.
The probability of winning a game is\(2\over5\).The probability of lossing it is.......
2.
Probability of getting a prime number in single throw of a die is.....
3.
Probability of getting 6 with single die is.........
4.
A pair of fair dice is thrown and one die shows a 4.The probability that the other die shows 5 is...............
5.
Sum of the probabilities of each outcome in an experiment is...........
6.
The probability of an event is greater than or equal to __________ and less than or equal to____________
7.
The sum of the probabilities of all the elementary events of an experiment is _______________
8.
The probability of an event that is certain to happen is ___________Such an event is called_____________
9.
The probability of an event that cannot happen is _______ Such an event is called________
10.
Which of the following cannot be the probability of an event?
\(\frac{2}{3}\)
-1.5
15%
0.7
11.
If P(E)=0.7, then the probability of 'not E' is
12.
Three coins are tossed simultaneously, the probability of getting two Heads is
13.
Two coins are tossed simultaneously.
14.
A die is thrown once.The probability of getting a number greater than four is
15.
In a class of 15 students, 8 are boys and rest are girls.The probability that a student selected will be girl is
16.
If a Random experiment is performed, then each of its outcome is known as favourable event.
17.
For an event \(E,\ P(\overset { - }{ E } )=1-P(E)\) .
18.
The sum of probabilities of all the outcomes of an experiment is greater than one.
19.
The probability expressed as percentage of a particular occurrence can never be less than zero
20.
Probability of an event lies between zero and one.
1.
( )
3/5
2.
( )
1/2
3.
( )
1/6
4.
( )
\(1\over18\)
5.
( )
1
6.
( )
0, 1, since, the probability of each event lies between 0 and 1.
7.
( )
1,(e.g. Suppose a die is thrown, then P(getting1) + P(getting2) + P(getting 3) + P(getting 4)+ P(gerting 5) + P(getting 6) =1)
8.
( )
1, sure event. (e.g. The event of getting a number less than 7 in a single throw of a die is a sure event and its probability is 1.)
9.
( )
0, impossible event. (e.g. Suppose a die is thrown and we have to determine the probability of getting 8. This type of event is called an impossible event and probability ofthis event is 0.)
10.
(b)
-1.5
11.
( )
\(3\over10\)
12.
( )
\(3\over8\)
13.
( )
\(1\over4\)
14.
( )
\(1\over3\)
15.
( )
\(7\over15\)
16.
(b)
17.
(a)
18.
(b)
19.
(a)
20.
(b)
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