Probability MCQ Set 1
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Answer: A