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Aptitude - Probability

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Exercise

  • General Questions
"Nothing is impossible to a willing heart."
- (Proverb)
1. 

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

A.
1
2
B.
2
5
C.
8
15
D.
9
20

2. 

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

A.
10
21
B.
11
21
C.
2
7
D.
5
7

3. 

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

A.
1
3
B.
3
4
C.
7
19
D.
8
21
E.
9
21

4. 

What is the probability of getting a sum 9 from two throws of a dice?

A.
1
6
B.
1
8
C.
1
9
D.
1
12

5. 

Three unbiased coins are tossed. What is the probability of getting at most two heads?

A.
3
4
B.
1
4
C.
3
8
D.
7
8




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