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  • Question
  • 8 men entered a lounge simultaneously. If each person shook hands with the other, then find the total no. of hand shakes?


  • Options
  • A. 16
  • B. 36
  • C. 56
  • D. 28

  • Correct Answer
  • 28 

    Explanation

    Required no. of hand shakes = {8 x (8 - 1)}/2 = 28


  • Permutation and Combination problems


    Search Results


    • 1. 
      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
    • 2. 
      There are 10 oranges in a basket. Find the no. of ways in which 3 oranges are chosen from the basket?

    • Options
    • A. 125
    • B. 140
    • C. 110
    • D. 120
    • Discuss
    • 3. 
      How many groups of 6 persons can be formed from 8 men and 7 women?

    • Options
    • A. 5000
    • B. 5005
    • C. 5050
    • D. None of these
    • Discuss
    • 4. 
      If 56P r + 6 : 54P r + 3 = 30800 : 1 then the value of r is?

    • Options
    • A. 40
    • B. 41
    • C. 42
    • D. None of these
    • Discuss
    • 5. 
      If three marbles are picked at random, what is the probability that at least one is blue?

    • Options
    • A. 7/12
    • B. 37/44
    • C. 5/12
    • D. 7/44
    • Discuss
    • 6. 
      If n+2C 8 : n- 2P 4 = 57 : 16 then the value of n is?

    • Options
    • A. 20
    • B. 19
    • C. 18
    • D. 17
    • Discuss
    • 7. 
      Find the value of 5 P 2.

    • Options
    • A. 15
    • B. 18
    • C. 20
    • D. 122
    • Discuss
    • 8. 
      If 50c r = 50c r + 2 find r.

    • Options
    • A. 24
    • B. 23
    • C. 22
    • D. 21
    • Discuss
    • 9. 
      If nP 3 = 9240, then find the value of n.

    • Options
    • A. 20
    • B. 21
    • C. 22
    • D. 23
    • Discuss
    • 10. 
      In how many different ways, can the letters of the word 'INHALE' be arranged?

    • Options
    • A. 720
    • B. 360
    • C. 120
    • D. 650
    • Discuss


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