Probability MCQ Question with Answer

Probability MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Bag contain 10 back and 20 white balls, One ball is drawn at random. What is the probability that ball is white

\frac{2}{3}

\frac{1}{3}

\frac{4}{3}

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Question No : 2
A box contains 5 green, 4 yellow and 3 white balls. Three balls are drawn at random. What is the probability that they are not of same colour.

\frac{52}{55}

\frac{3}{55}

\frac{41}{44}

\frac{3}{44}

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Question No : 3
From a pack of 52 cards, two cards are drawn together, what is the probability that both the cards are kings

\frac{2}{121}

\frac{2}{221}

\frac{1}{221}

\frac{1}{13}

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Question No : 4
A speaks truth in 75% of cases and B in 80% of cases. In what percentage of cases are they likely to contradict each other, narrating the same incident

30%

35%

40%

45%

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Question No : 5
A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is