1.) A die is thrown 1000 times and the outcomes were recorded as follows :
(A) 9/50
(B) 3/20
(C) 4/25
(D) 7/25
2.) In a sample study 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) 0.6
(C) 0.7
(D) 0.8
3.) In a survey of 364 children aged 19-36 months, it was found that 91 liked to eat potato chips. If a child is selected at random, the probability that he/she does not like to eat potato chips is :
(A) 0.25
(B) 0.50
(C) 0.75
(D) 0.80
4.) In a medical examination of students of a class, the following blood groups are recorded:
A student is selected at random from the class. The probability that he/she has blood group B, is :
(A) 1/4
(B) 13/40
(C) 3/10
(D) 1/8
5.) Two coins are tossed 1000 times and the outcomes are recorded as below :
Based on this information, the probability for at most one head is
(A) 1/5
(B) 1/4
(C) 4/5
(D) 3/4
6.) 80 bulbs are selected at random from a lot and their life time (in hrs) is recorded in the form of a frequency table given below :
One bulb is selected at random from the lot. The probability that its life is 1150 hours, is
(A) 1/80
(B) 7/16
(C) 0
(D) 1
7.) Refer to Q.29 above :
The probability that bulbs selected randomly from the lot has life less than 900 hours is :
(A)11/40
(B) 5/16
(C) 7/16
(D) 9/16
8.) Here is an extract from a mortality table.
(i) Based on this information, what is the probability of a person ‘aged 60’ of dying within a year?
(ii) What is the probability that a person ‘aged 61’ will live for 4 years?
9.) What is the minimum value of probability
(A) 1/2
(B) 0
(C) 2
(D) None of the above.
ANSWERS
1.) B 2.) D 3.) C 4.) C 5.) C 6.) C 7.) D 8.) (i) 460/1609 (ii) 232/1149 9.) B