logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Probability Comments

  • Question
  • Cards are down at random from a pack of 200 cards numbered 1 to 200. Find the probability of drawing a number which is a perfect cube?


  • Options
  • A. 1/40
  • B. 3/40
  • C. 7/40
  • D. 19/40

  • Correct Answer
  • 1/40 

    Explanation

    Total number of ways of selecting 1 card from 200 cards is 200C1 ways.
    Let E be an event of drawing a number which is a perfect cube.
    E = {1, 8, 27, 64, 125 }
    ? P(E) = n(E) / n(S)
    = 5C1 / 200C1 = 5/200 = 1/40


  • Probability problems


    Search Results


    • 1. 
      when three coins are tossed together the probability that all coins have the same face up, is?

    • Options
    • A. 1/3
    • B. 1/6
    • C. 1/8
    • D. 1/12
    • Discuss
    • 2. 
      Two packs of card are thoroughly mixed and shuffled and two cards are drawn at random, one after the other. What is the probability that both of them are jack?

    • Options
    • A. 1/13
    • B. 2/13
    • C. 7/1339
    • D. 1/169
    • Discuss
    • 3. 
      A brother and sister appear for an interview against two vacant posts in an office. The probability of the brother's selection is 1/5th and that of the sister's selections is 1/3rd. What is the probability that one of them is selected?

    • Options
    • A. 1/5
    • B. 2/5
    • C. 1/3
    • D. 2/3
    • Discuss
    • 4. 
      In his wardrobe, Girdhari has 3 trousers. One of them is grey the second blue and the third brown. In his wardrobe he also has 4 shirts. One of them is grey and the other 3 are white. He opens his wardrobe in the dark and pick out one shirt trouser pair without examination the color. What is the likelihood that neither the shirt nor the trouser is grey?

    • Options
    • A. 1/12
    • B. 1/6
    • C. 1/4
    • D. 1/2
    • Discuss
    • 5.  Raja can hit a target 3 times in 6 shots, Karan can hit the target 2 times in 6 shots and Ashwini can hit 4 times in 4 shots. What is the probability that atleast 2 shots hit the target?

    • Options
    • A. 1/2
    • B. 2/3
    • C. 1/3
    • D. 5/6
    • Discuss
    • 6. 
      Two unbiased dice are thrown simultaneously. the probability of getting the sum divisible by 3, is?

    • Options
    • A. 11/36
    • B. 12/36
    • C. 13/36
    • D. 17/36
    • Discuss
    • 7. 
      What is the possibility of getting at least 6 heads, if eight coins are tossed simultaneously?

    • Options
    • A. 37/256
    • B. 25/57
    • C. 1/13
    • D. None of these
    • Discuss
    • 8. 
      A and B aim a target. The Probability that A hits the target is 5/7 and B hits the target in 7/10. What is the probability that exactly one of them hits the target?

    • Options
    • A. 21/10
    • B. 29/70
    • C. 31/70
    • D. 33/70
    • Discuss
    • 9. 
      A bag contains 5 white, 7 red and 8 black balls. If 4 balls are drawn one by one with replacement, what is the probability that all are white?

    • Options
    • A. 1/256
    • B. 1/16
    • C. 4/20
    • D. 4/8
    • Discuss
    • 10. 
      There are 8 blue and 4 white balls in a bag . A ball is drawn at random. Without replacing it another ball is drawn. Find the probability that both the balls drawn are blue?

    • Options
    • A. 7/33
    • B. 14/33
    • C. 11/33
    • D. 2/33
    • Discuss


    Comments

    There are no comments.

Enter a new Comment