The following probabilities are given; choose the correct answer for that which is not possible.
Answer: C
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When two coins are tossed simultaneously, what are the chances of getting at least one tail?
Answer: A
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A coin is tossed live times. What is the probability that there is at the least one tail?
Answer: A
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Three unbiased coins are tossed. What is the probability of getting at least 2 tails?
Answer: B
S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
E = {HTT, THT, TTH, TTT}
n(S) = 8
n(E) = 4
P(E) =n(E) / n(S) = 4/8 = 0.5
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A fair dice is rolled. Probability of getting a number x such that 1 ≤ x ≤ 6, is
Answer: D
1, ∵ It is a sure event.
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A letter is chosen at random from the letters of the word ASSASSINATION. The probability that the letter chosen has:
Answer: B
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In a Poisson probability distribution
Answer: A
The mean and variance in Poisson distribution are always the same.
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A bucket contains 10 brown balls, 8 green balls, and 12 red balls and you pick one randomly without looking. What is the probability that the ball will be brown?
Answer: C
There are a total of 10 + 8 + 12 = 30 balls, out of which 10 are brown.
The required probability is 10/30 = 1/3.
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The joint probability is
Answer: A
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If P (A) and P (not A) are complementary events and P (A) = 0.15, then P (not A) =?
Answer: C
Given, P (A) = 0.15
As, P (A) and P (not A) are complementary events, P (A) + P (not A) = 1
P (not A) = 1 – P (A) = 1 – 0.15 = 0.85
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