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  • Question
  • When Dr. Ram arrives in his dispensary, he finds 12 patients waiting to see him. If he can see only one patients at a time,find the number of ways, he can schedule his patients if 3 leave in disgust before Dr. Ram gets around to seeing them.


  • Options
  • A. 479001600
  • B. 79833600
  • C. 34879012
  • D. 67800983

  • Correct Answer
  • 79833600 

    Explanation

    There are 12 - 3 = 9 patients.They can be seen in  12 P 9  = 79833600 ways


  • Permutation and Combination problems


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    • 1. In how many different ways can 3 students be associated with 4 chartered accountants,assuming that each chartered accountant can take at most one student?

    • Options
    • A. 12
    • B. 36
    • C. 24
    • D. 16
    • Discuss
    • 2. How many 3 letters words can be formed using the letters of the words hexagon?

    • Options
    • A. 120
    • B. 210
    • C. 160
    • D. 200
    • Discuss
    • 3. In how many ways can you choose one or more of 12 different candies?

    • Options
    • A. 4054
    • B. 4050
    • C. 4095
    • D. 4059
    • Discuss
    • 4. From a deck of 52 cards, a 5 card hand is dealt.How may distinct five card hands are there if the queen of spades and the four of diamonds must be in the hand?

    • Options
    • A. 52C5
    • B. 50C3
    • C. 52C4
    • D. 50C4
    • Discuss
    • 5. From a deck of 52 cards, a 7 card hand is dealt.How many distinct hands are there if the hand must contain 2 spades and 3 diamonds ?

    • Options
    • A. 7250100
    • B. 7690030
    • C. 7250000
    • D. 3454290
    • Discuss
    • 6. In how many ways can 4 sit at a round table for a group discussions?

    • Options
    • A. 9
    • B. 3
    • C. 6
    • D. 12
    • Discuss
    • 7. In how many ways can 5 different toys be packed in 3 identical boxes such that no box is empty, if any of the boxes may hold all of the toys?

    • Options
    • A. 15
    • B. 10
    • C. 25
    • D. 20
    • Discuss
    • 8. In how many different ways can 6 different balls be distributed to 4 different boxes, when each box can hold any number of ball?

    • Options
    • A. 2048
    • B. 1296
    • C. 4096
    • D. 576
    • Discuss
    • 9. What is the total no of ways of selecting atleast one item from each of the two sets containing 6 different items each?

    • Options
    • A. 2856
    • B. 3969
    • C. 480
    • D. None of these
    • Discuss
    • 10. 16 persons are participated in a party. In how many differentways can they host the seat in a circular table, if the 2particular persons are to be seated on either side of the host?

    • Options
    • A. 16! × 2
    • B. 14! × 2
    • C. 18! × 2
    • D. 14!
    • Discuss


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