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Home Aptitude Probability Comments

  • Question
  • A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?


  • Options
  • A. 3/7
  • B. 4/7
  • C. 1/8
  • D. 3/4

  • Correct Answer
  • 4/7 

    Explanation

    Let number of balls = (6 + 8) = 14.

    Number of white balls = 8.

    P (drawing a white ball) = 8 /14 = 4/7.


  • Probability problems


    Search Results


    • 1. Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

    • Options
    • A. 3/20
    • B. 29/34
    • C. 47/100
    • D. 13/102
    • Discuss
    • 2. A basket contains 10 apples and 20 oranges out of which 3 apples and 5 oranges are defective. If we choose two fruits at random, what is the probability that either both are oranges or both are non defective?

    • Options
    • A. 136/345
    • B. 17/87
    • C. 316/435
    • D. 158/435
    • Discuss
    • 3. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

    • Options
    • A. 21/46
    • B. 1/5
    • C. 3/25
    • D. 1/50
    • Discuss
    • 4. A letter is takenout at random from 'ASSISTANT' and another is taken out from 'STATISTICS'. The probability that they are the same letter is :

    • Options
    • A. 35/96
    • B. 19/90
    • C. 19/96
    • D. None of these
    • Discuss
    • 5. Two dice are thrown together .What is the probability that the sum of the number on the two faces is divided by 4 or 6.

    • Options
    • A. 7/18
    • B. 14/35
    • C. 8/18
    • D. 7/35
    • Discuss
    • 6. Three unbiased coins are tossed.What is the probability of getting at least 2 heads?

    • Options
    • A. 1/4
    • B. 1/2
    • C. 3/4
    • D. 1/3
    • Discuss
    • 7. One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen and King only)?

    • Options
    • A. 3/13
    • B. 1/13
    • C. 3/52
    • D. 9/52
    • Discuss
    • 8. 8 couples (husband and wife) attend a dance show "Nach Baliye' in a popular TV channel ; A lucky draw in which 4 persons picked up for a prize is held, then the probability that there is atleast one couple will be selected is :

    • Options
    • A. 8/39
    • B. 15/39
    • C. 12/13
    • D. None of these
    • Discuss
    • 9. If two letters are taken at random from the word HOME, what is the probability that none of the letters would be vowels?

    • Options
    • A. 1/6
    • B. 1/2
    • C. 1/3
    • D. 1/4
    • Discuss
    • 10. In a class, 30% of the students offered English, 20% offered Hindi and 10% offered both. If a student is selected at random, what is the probability that he. has offered English or Hindi ?

    • Options
    • A. 1/2
    • B. 3/4
    • C. 4/5
    • D. 2/5
    • Discuss


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