SBI PO · Quantitative Aptitude
Single-event probability — coins, dice, cards, balls.
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Q1 · Probability · EASY
A bag contains 5 red balls, 4 green balls, and 3 blue balls. If one ball is drawn at random from the bag, what is the probability that it is either red or blue?
Q2 · Probability · MEDIUM
Two dice are thrown simultaneously. What is the probability that the sum of the numbers on the two dice is 9?
Q3 · Probability · EASY
A card is drawn at random from a well-shuffled deck of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen, or King)?
Q4 · Probability · MEDIUM
A box contains 8 white balls and 6 black balls. Two balls are drawn at random one after the other without replacement. What is the probability that both balls drawn are white?
Q5 · Probability · MEDIUM
Three coins are tossed simultaneously. What is the probability of getting at least two heads?