Arithmetic Aptitude :: Probability
- The probability that a number selected at random from the first 50 natural numbers is a composite number is -.
- A coin is tossed live times. What is the probability that there is at the least one tail?
- If a number is chosen at random from the set {1, 2, 3, ...., 100}, then the probability that the chosen number is a perfect cube is -.
- Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is -.
- If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is -.
- If four coins are tossed, the probability of getting two heads and two tails is -.
- If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is -.
- If six persons sit in a row, then the probability that three particular persons are always together is -.
- A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is -.
- A basket has 5 apples and 4 oranges. Three fruits are picked at random. The probability that at least 2 apples are picked is -.
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= There is not even a single tail.
= 18/36 = 1/2