Probability
1 solved SSC CGL Quantitative Aptitude previous year questions on Probability, each with the correct answer and a full explanation.
Q1
Three cards are drawn one after another with replacement from a pack of cards. What is the probability of getting first card a Jack, second card a black card, and third card an even numbered card?
✓ Correct answer: a) 5/338
ExplanationProbability of drawing a Jack (first card) = 4/52 Probability of drawing a black card (second card) = 26/52 Probability of drawing an even numbered card (third card) 20/52 Combined probability of all three events happening in sequence.(4/52)x(26/52) x (20/52) =(1/13) x (1/2)x(5/13) =1/13x1/2×5/13 =5/(13x13x2) =5/338 Hence, Option A is the correct answer
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