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Home Aptitude Probability See What Others Are Saying!
  • 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


  • More questions

    • 1. 
      The ratio of ages of the father and the daughter at present is 3 : 1. Four year ago the ratio was 4 : 1 . The average age of the father and daughter 2 year hence will be

    • Options
    • A. 24
    • B. 26
    • C. 25
    • D. 36
    • Discuss
    • 2. 
      From a set of 17 cards numbered 1, 2, 3 ....... 17 one is drawn at random. The probability that the number is divisible by 3 or 7 is?

    • Options
    • A. 2/17
    • B. 1/7
    • C. 7/17
    • D. 10/ 17
    • Discuss
    • 3. 
      A card is drawn at random from a pack of 100 cards numbered 1 to 100. The probability drawing a number which is a square is?

    • Options
    • A. 1/5
    • B. 2/5
    • C. 1/10
    • D. None of these
    • Discuss
    • 4. 
      There are 25 students in a class. Find the number of ways in which a committee of 3 students is to be formed.?

    • Options
    • A. 2200
    • B. 2300
    • C. 2400
    • D. 3200
    • Discuss
    • 5. 
      What is the HCF of 8 (N 5 - N 3 + N ) and 28 (N 6 + 1)?

    • Options
    • A. 4 (N4 - N2 + 1)
    • B. N3 - N + 4N2
    • C. N3 - N + 3N2
    • D. None of these
    • Discuss
    • 6. 
      A sum amounts to ? 1352 in 2 yr at 4% compound interest. The sum is

    • Options
    • A. ? 1250
    • B. ? 1200
    • C. ? 1300
    • D. ? 1260
    • Discuss
    • 7. 
      The average of three number is 42. The first is twice the second and the second is twice the third the different between the third largest and the smallest number number is?

    • Options
    • A. 18
    • B. 36
    • C. 54
    • D. 72
    • Discuss
    • 8. 
      A train 700 m long is running at the speed of 72 km/hr. If it cross a tunnel in 1 minute, then the length of the tunnel?

    • Options
    • A. 700 m
    • B. 600 m
    • C. 550 m
    • D. 500 m
    • Discuss
    • 9. 
      A number when divided by 6 is diminished by 40. The number is?

    • Options
    • A. 72
    • B. 84
    • C. 60
    • D. 48
    • Discuss
    • 10. 
      In what time will Rs. 390625 amount to Rs. 456976 at 4 per cent compound interest?

    • Options
    • A. 2 years
    • B. 4 years
    • C. 3 years
    • D. 5 years
    • Discuss


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