IBPS PO · Quantitative Aptitude
Single-event probability — coins, dice, cards, balls in a bag.
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Q1 · Probability · EASY
A bag contains 5 red balls, 4 blue balls, and 6 green balls. If one ball is drawn at random from the bag, what is the probability that it is either red or green?
Q2 · Probability · MEDIUM
Two fair dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on them is 9?
Q3 · Probability · MEDIUM
A card is drawn at random from a well-shuffled deck of 52 playing cards. What is the probability that the card drawn is either a king or a heart?
Q4 · Probability · MEDIUM
A coin is tossed three times. What is the probability of getting at least two heads?
Q5 · Probability · HARD
A box contains 8 white balls and 12 black balls. Two balls are drawn at random without replacement. What is the probability that both balls drawn are white?