On rolling a dice 2 times, the sum of 2 numbers that appear on the uppermost face is 8. What is the probability that the first throw of dice yields 4?
Answer: B
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A single die is rolled. The probability of getting 1 or an even number is
Answer: D
The favorable outcomes are 1, 2, 4 and 6.
We have 4 favorable outcomes out of a total outcomes of 6.
Thus the required probability = 4/6 = 2/3.
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A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:
Answer: C
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The sum of the probabilities of all elementary events of an experiment is p, then
Answer: C
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What is probability of drawing two clubs from a well shuffled pack of 52 cards?
Answer: B
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Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
Answer: B
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In which approach to probability the outcomes are equally likely to occur?
Answer: A
In Classical probability the outcomes are equally likely to occur.
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In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
Answer: A
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A box has 10 black and 10 white balls. What is the probability of getting two balls of the same color?
Answer: C
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Tickets numbered 1 to 50 are mixed and one ticket is drawn at random. Find the probability that the ticket drawn has a number which is a multiple of 4 or 7?
Answer: A
S = {1, 2, 3, … , 49, 50}
E = {4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 7, 14, 21, 35, 42, 49}
n(S) = 50
n(E) = 18
P(E) = n(E)/n(S) = 18/50
= 9/25
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