PROBABILITY MCQ SET 1
1. If the probability of winning a game is 0.3 , what is the probability of losing it?
(a) 0.9
(b) 0.7
(c) 0.8
(d) 0.6
Answer: B
2. What is the probability of a prime number , if we select a number from first 20 natural numbers?
(a) 1/2
(b) 4/5
(c) 2/5
(d) 1/4
Answer: C
3. There are 3 white an 4 black balls in an urn . A ball is selected randomly . What is the probability to be white –
(a) 1/4
(b) 1/7
(c) 4/7
(d) 3/7
Answer: D
4. A bag contains cards which are numbered from 2 to 90 . A card is drawn at random from the bag . Find the probability that the card number is a perfect square .
(a) 4/45
(b) 7/89
(c) 8/89
(d) 1/10
Answer: C
5. A jar contains 54 marbles each of which is blue , green or white . The probability of selecting a blue marble at random from the jar is 1/3 , and the probability of selecting a green marble at random is 4/9 . How many white marbles does the jar contain ?
(a) 12
(b) 14
(c) 16
(d) 20
Answer: A
6. Find the probability that a number selected at random from first hundred natural numbers is a multiple of 3 or 5?
(a) 53/100
(b) 47/100
(c) 3/50
(d) None of these
Answer: B
7. In how many ways can the letter of the word QUANTS be arranged (Repetition is not allowed)?
(a) 720
(b) 616
(c) 480
(d) None of these
ย Answer: A
8. In how many different ways can the letter of the word ‘ADITYA’ be arranged?
(a) 120
(b) 360
(c) 480
(d) 720
Answer: B
9. In how many different ways can the letters of the word ‘BANKING’ be arranged?
(a) 5040
(b) 2540
(c) 5080
(d) 2520
Answer: D
10. In how many different ways can the letters of the word ‘DESIGN’ be arranged so that the vowels are at the two ends?
(a) 48
(b) 72
(c) 36
(d) 24
Answer: A
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