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  • Question
  • Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?


  • Options
  • A. 2/3
  • B. 1/2
  • C. 7/8
  • D. 4/5

  • Correct Answer
  • 1/2 

    Explanation

    Multiples of 3 below 20 are 3, 6, 9, 12, 15, 18
    Multiples of 5 below 20 are 5, 10, 15, 20
    Required number of possibilities = 10
    Total number of possibilities = 20
    Required probability = 10/20 = 1/2.

  • Tags: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst

    Probability problems


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    • 1. The probabilities that A and B will tell the truth are 2 / 3 and 4 / 5 respectively . What is the probability that they agree with each other ?

    • Options
    • A. 3/5
    • B. 1/3
    • C. 2/5
    • D. 3/4
    • Discuss
    • 2. One card is drawn from a pack of 52 cards,each of the 52 cards being equally likely to be drawn.Find the probability that the ball drawn is an ace :

    • Options
    • A. 1/13
    • B. 1/12
    • C. 1/14
    • D. 1/15
    • Discuss
    • 3. An unbiased cubic die is thrown.What is the probabiltiy of getting a multiple of 3 or 4?

    • Options
    • A. 1/12
    • B. 1/9
    • C. 3/4
    • D. 1/2
    • Discuss
    • 4. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:

    • Options
    • A. 2/13
    • B. 1/13
    • C. 1/26
    • D. 1/52
    • Discuss
    • 5. There are 10 Letters and 10 correspondingly 10 different Address. If the letter are put into envelope randomly, then find the Probability that Exactly 9 letters will at the Correct Address ?

    • Options
    • A. 1/10
    • B. 1/9
    • C. 1
    • D. 0
    • Discuss
    • 6. Three fair coins are tossed simultaneously. Find the probability of getting more heads than the number of tails

    • Options
    • A. 2
    • B. 7/8
    • C. 5/8
    • D. 1/2
    • Discuss
    • 7. A number is selected from the numbers 1,2,3,4.......25.The probability for it to be divisible by 4 or 7 is:

    • Options
    • A. 3/25
    • B. 9/25
    • C. 1/25
    • D. None of these
    • Discuss
    • 8. Four persons are to be choosen from a group of 3 men, 2 women and 4 children. Find the probability of selecting 1 man,1 woman and 2 children.

    • Options
    • A. 2/7
    • B. 3/7
    • C. 4/7
    • D. 3/7
    • Discuss
    • 9. Two unbiased coin are tossed. What is the probability of getting atmost one head?

    • Options
    • A. 1/2
    • B. 3/2
    • C. 1/6
    • D. 3/4
    • Discuss
    • 10. You toss a coin AND roll a die. What is the probability of getting a tail and a 4 on the die?

    • Options
    • A. 1/2
    • B. 1/12
    • C. 2/3
    • D. 3/4
    • Discuss


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