15 Questions | Total Attempts: 1804  Settings  • 1.
If probability of success is 0.5 % then what will be the probability of failure?
• A.

9.75

• B.

0.0975

• C.

97.5

• D.

0.975

• 2.
A coin is tossed 50 times and the data is recorded as follows:Head   15Tail      35What is the probability of not getting a head?
• A.

0.7

• B.

0.03

• C.

0.3

• D.

0.6

• 3.
In a cricket match, batsman hits a sixer 8 times out of 32 balls played. The probability that a sixer is not hit in a ball is:
• A.

0.75

• B.

0.25

• C.

0.25

• D.

0.50

• 4.
A box contains 550 electric bulbs, out of which 20 bulbs were found to be defected. One bulb is taken out at random from this box. What is the probability that it is a non-defective bulb?
• A.

53/55

• B.

2/55

• C.

16/55

• D.

None of these

• 5.
Data of the blood groups of 40 students of a class was recorded as below:A student is selected at random from the class. What is the probability that the student does not have blood group AB.
• A.

3/8

• B.

3/5

• C.

5/8

• D.

6/8

• 6.
Three of the six vertices of a regular hexagon are chosen at random. Find the probability that the triangle with three vertices is equilateral.
• A.

1/2

• B.

1/10

• C.

1/5

• D.

1/6

• 7.
Ten bags of wheat flour each marked 5 kg, actually contained the following weights of flour (in kg):5.05, 5.06, 4.80, 5.00, 4.95, 5.08, 5.10, 4.98, 5.00, 5.04Find the probability of chosing a bag randomly containing the weight not equal to 5 kg.
• A.

1/5

• B.

3/5

• C.

4/5

• D.

2/5

• 8.
In a survey conducted among 300 teenagers to find outg their eating habits, it was found that 91 liked to eat fruit potato chips, 50 were fond of having pizzas, 99 choosed burgers and the rest liked to stay away of the junk food. If a teenager is selected at random, find the probability that he or she does not like to eat burgers.
• A.

0.5

• B.

0.33

• C.

0.8

• D.

0.67

• 9.
The king, queen and jack of cubs are removed from a deck of 52 playing cards and then well shuffled. One card is selected from the remaining cards. Find the probnability that the card taken out is a club.
• A.

3/49

• B.

13/49

• C.

12/49

• D.

10/49

• 10.
In a group of 642 people, it was found  that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is:
• A.

0.5

• B.

0.7

• C.

0.6

• D.

0.8

• 11.
Following table shows the marks obtained by 2400 students in a particular subject:If a student is selected at random what will be the probability that he scores  mopre than 40% marks.
• A.

47/60

• B.

39/120

• C.

11/24

• D.

13/60

• 12.
17 cards numbered 1, 2, 3, ……., 19, 20 are put in a box and mixed thoroughly. Find the probability that the card taken out at random is the one with a prime number on it.
• A.

9/20

• B.

2/5

• C.

1/2

• D.

3/5

• 13.
From a lot 80 bulbs are selected at random and their life time is recorded in the form of frequency table given below:One bulb is selected at random from the lot. The probability that its life is equal to or more than 700 is:
• A.

1/2

• B.

23/50

• C.

7/16

• D.

29/40

• 14.
A bag contains 5 red balls and some blue balls. If the probability of drawing  ablue ball is double that of a red ball, then what are the number of blue balls in the bag.
• A.

10

• B.

20

• C.

30

• D.

24

• 15.
The record of a weather station shows that out of the past 250 consecutive days, its weather forecasts were correct 175 times. What is the probability that it was not correct on a given day?
• A.

0.7

• B.

0.3

• C.

0.5

• D.

0.8

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