What is the possibility of having 53 Thursdays in a non-leap year?
Answer: B
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The probability that it will rain tomorrow is 0.85. What is the probability that it will not rain tomorrow
Answer: C
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A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
Answer: A
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24 cards numbered 1, 2, 3, …., 23, 24 are put in a box and mixed thoroughly. One person draws a card from the box. The probability that the number on the card is divisible by 2 or 3 or both is
Answer: B
The total possible outcomes = 24
Numbers divisible by only 2 are 2, 4, 8, 10, 14, 16, 20, 22 (8 numbers) ——— (1)
Numbers divisible only by 3 are 3, 9, 15, 21 (4 numbers) ——— (2)
Numbers divisible by both 2 and 3 are 6, 12, 18, 24 (4 numbers) ——— (3)
From (1), (2) and (3), we see that the number of favourable outcomes is 16 (i.e., 8 + 4 + 4).
We know that, Probability of an event E, P (E) =number of favourable outcomes/ total number of outcomes
=16/24
=2/3
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What is the probability of not picking a face card when you draw a card at random from a pack of 52 cards?
Answer: C
Since there are 12 face cards in a deck of 52cards, the probability of drawing a face card is 12/52= 3/13
Hence, the probability of not picking a face card = 1 – 3/13= 10/13
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A dice is rolled twice. What is the probability of getting sum 9?
Answer: C
Possible event = 6*6 = 36
Favourable outcomes= {(3, 6), {4, 5}, {5, 4}, (6, 3)}
Thus probability; favourable/total
= 4/36
=> 1/9
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Which of the following is not a correct statement about a probability
Answer: D
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An event is very unlikely to happen. Its probability is closest to
Answer: A
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Two dice are tossed. The probability that the total score is a prime number is:
Answer: B
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What is the probability that the minute and hour hands of a clock will form an acute angle at any given time?
Answer: C
The amount of time in a period of 12 hours when the hands will form an acute angle will be the same as that for obtuse angle. So, you would think that the probability is 12. But if you take into account the small amounts of time when the hands are aligned ( 0∘), hands are at right angles and hands are facing in opposite directions (180∘), then the probability would be slightly less than 0.5.
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