1) The “Sum Of All Probabilities” is equal to–
a. 4
b. 2
c. 3
d. 1
Answer: d
2. Three coins were tossed 200 times. The number of times 2 heads appeared is 72. As a result, the probability of 2 heads coming up is–
a. 1/25
b. 9/25
c. 7/25
d. 2/25
Answer: b
3) A card is taken out from a well shuffled deck of 52 cards. What’s the probability of getting a king of the red suits?
a. 3/36
b. 1/16
c. 3/26
d. 1/26
Answer: b
4) A poll of 364 children age 19 to 36 months revealed that 91 of them enjoyed eating potato chips. The probability that a child chosen at random does not enjoy eating potato chips is–
(a) 0.75
(b) 0.50
(c) 0.25
(d) 0.80
Answer: a
5) 16 cards with the numbers 1, 2, 3,…, 16 are contained within a bag. A random card is chosen. What is the probability that a given number can be divided by 3?
(a) 316
(b) 1316
(c) 1116
(d) 516
Answer: d
6) The sum of the probabilities of all events of a trial is–
(a) less than 1
(b) greater than 1
(c) 1
(d) between 0 and 1
Answer: c
7) A & B throw a pair of dice. If A throws 9, then B has chance of throwing a huge number is–
(a) 2/9
(b) 1/9
(c) 1/3
(d) 1/6
Answer: d
8) A die is thrown 300 times & odd numbers are obtained 153 times. Then, the probability of getting an even no. is–
(a) 147/300
(b) 153/300
(c) 147/153
(d) 174/300
Answer: a
9) In a football match, a player hits Eight goals out of 60 balls. Find out the probability that the player did not hit the goal–
(a) 11/15
(b) 13/15
(c) 8/15
(d) 4/5
Answer: b
10) A bag contains 5 red balls & some grey balls. The probability of getting a blue ball is double that of a red ball. The no. of grey balls in the bag is–
(a) 5
(b) 30
(c) 20
(d) 10
Answer: d
11) Getting a tail is an event with outcome ____
a) None
b) Head
c) Both a and b
d) Tail
Answer: d
12) _____ is the set which includes all the events.
a) Sample space
b) A trial
c) An event
d) None
Answer: a
13) What is the probability of getting at least 3 heads when 3 coins are tossed simultaneously then
a) 1
b) 8
c) -1/8
d) 1/8
Answer: d
14) Three coins were tossed 200 times. The number of times 2 heads appeared is 72. As a result, the probability of 2 heads coming up is–
(a) 9/25
(b) 2/25
(c) 7/25
(d) 1/25
Answer: a
15) If the probability of an event to happen is 0.3 and the probability of the event not happening is:
(a) 0.5
(b) 0.6
(c) 0.7
(d) None of the above
Answer: c
16) There are 4 yellow & 2 white balls in a basket. What is the probability of getting the white balls?
(a) 1/2
(b) 1/6
(c) 1/5
(d) 1/3
Answer: d
17) Empirical probability is also called as-
(a) Experimental probability
(b) Subjective probability
(c) Classic probability
(d) None of the above
Answer: a
18) The probability of the events lies between
(a) -1 ≤ p ≤ 1
(b) -1 < p ≤ 1
(c) -1 ≤ p ≤ 0
(d) 0 ≤ p ≤ 1
Answer: d
19) Find the probability of a household earning more than 25000 per year & having 2 or more mobile set
(a) .1.1
(b) .3.3
(c) .245.245
(d) None of these
Answer: c
20) What is the probability of getting a queen from the deck of 52 cards?
a. 1/13
b. 1/52
c. 1/26
d. 3/52
Answer: a
