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  • Question
  • A single letter is selected at random from the word 'PROBABILITY' . The probability that it is a vowel, is?


  • Options
  • A. 3/11
  • B. 4/11
  • C. 2/11
  • D. 0

  • Correct Answer
  • 4/11 

    Explanation

    Total number of letters = n(S) = 11
    whereas, number of vowels = n(E) = 4
    ? Required probability = n(E)/n(s) = 4/11


  • Probability problems


    Search Results


    • 1. 
      If the probability that A will live 15 yr is 7/8 and that B will live 15 yr is 9/10, then what is the probability that both will live after 15 yr?

    • Options
    • A. 1/20
    • B. 63/80
    • C. 1/5
    • D. None of these
    • Discuss
    • 2. 
      Find the probability that a vowel selected at random from the 5 vowels is an 'i'.?

    • Options
    • A. 4/5
    • B. 1/3
    • C. 1/5
    • D. 1/2
    • Discuss
    • 3. 
      A card is drawn from a well shuffled pack of cards. The probability of getting a queen of club or king of heart is?

    • Options
    • A. 1/52
    • B. 1/26
    • C. 1/13
    • D. None of these
    • Discuss
    • 4. 
      A bag contains 7 white and 9 red balls. The probability of drawing a white ball is?

    • Options
    • A. 1/16
    • B. 1/52
    • C. 7/52
    • D. 7/16
    • Discuss
    • 5. 
      A number is chosen at random among the first 120 natural numbers. The probability of the number chosen being a multiple of 5 or 15 is?

    • Options
    • A. 1/5
    • B. 1/8
    • C. 1/6
    • D. None of these
    • Discuss
    • 6. 
      The probability of drawing a red card from a deck of playing cards is

    • Options
    • A. 2/18
    • B. 1/13
    • C. 1/4
    • D. 1/2
    • Discuss
    • 7. 
      The probability of getting a composite number when a six-faced unbiased die is tossed, is

    • Options
    • A. 1/4
    • B. 1/3
    • C. 1/2
    • D. 1
    • Discuss
    • 8. 
      When two dice are rolled, what is the probability that the sum of the numbers appeared on them is 11?

    • Options
    • A. 1/6
    • B. 1/18
    • C. 1/9
    • D. 1
    • Discuss
    • 9. 
      Ticket numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3 or 7?

    • Options
    • A. 1/15
    • B. 1/2
    • C. 2/5
    • D. 7/20
    • Discuss
    • 10. 
      The odds against the occurrence of an event are 5 : 4. The probability of its occurrence is?

    • Options
    • A. 4/5
    • B. 4/9
    • C. 1/5
    • D. 1/4
    • Discuss


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