probability

Probability

Probability: Probability Formulas, Probability Meaning, Conditional Probability Definition, Probability Problems, Probability Questions with Solved Exercises

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Online Aptitude Questions with Answers on Probability

Q16. **The probability that a number selected at random from the first 50 natural numbers is a composite number is -.**

  1.  21/25
  2.  17/25
  3.  4/25
  4.  8/25
  5.  9/25

Solution : 17/25
Q17. **A coin is tossed five times. What is the probability that there is at the least one tail?**

  1.  31/32
  2.  1/16
  3.  1/2
  4.  1/32
  5.  N0ne of these

Solution : 31/32

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Q18. **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 -.**

  1.  1/25
  2.  1/2
  3.  4/13
  4.  1/10
  5.  9/13

Solution : 1/25
Q19. **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 -.**

  1.  1/2
  2.  16/19
  3.  4/5
  4.  17/20
  5.  3/5

Solution : 17/20

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Q20. **If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is -.**

  1.  1/4
  2.  1/2
  3.  3/4
  4.  3/5
  5.  None of these

Solution : 1/2
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Solution :

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