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  • Question
  • What is the value of 100P2 ?


  • Options
  • A. 10000
  • B. 9900
  • C. 8900
  • D. 7900

  • Correct Answer
  • 9900 

    Explanation

    Here in 100P2, P says that permutations and is defined as in how many ways 2 objects can be selected from 100 and can be arranged.

     

    That can be done as,

     

    100   P 2   = 100!/(100 - 2)!

    = 100 x 99 x 98!/98!

    = 100 x 99 

    = 9900.

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

    More questions

    • 1. 
      A certain sum becomes ? 600 in a certain time at the rate of 6% simple interest. The same sum amounts to ? 200 at the rate of 1% simple interest in the same duration. Find the sum and time.

    • Options
    • A. ? 120 and 662/3 yr
    • B. ? 150 and 662/3 yr
    • C. ? 130 and 662/3 yr
    • D. ? 160 and 662/3 yr
    • Discuss
    • 2. 
      A can do a work in 15 days. A and B together do the same work in 10 days. If they are paid ? 1500 for the work, how should the money be divided between A and B?

    • Options
    • A. 1000, 500
    • B. 500, 1000
    • C. 750, 750
    • D. None of these
    • Discuss
    • 3. 
      The tank-full of petrol in Arun's motor-cycle lasts for 10 days. If he starts using 25% more everyday, how many days will the tank-full of petrol last?

    • Options
    • A. 5
    • B. 6
    • C. 7
    • D. 8
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    • 4. 
      Value of ? in expression
      78.9 ÷ (343)1.7 x (49)4.8 = 7? is

    • Options
    • A. 13.4
    • B. 12.8
    • C. 11.4
    • D. 9.6
    • Discuss
    • 5. 
      Construct a quadratic equation whose roots have the sum = 6 and product = ?16.

    • Options
    • A. x2 - 6x - 16 = 0
    • B. x2 + 6x - 16 = 0
    • C. x2 - ?3x - 16 = 0
    • D. None of these
    • Discuss
    • 6. 
      ? 6 + ?6 + ?6 +........ is equal to

    • Options
    • A. 2
    • B. 5
    • C. 4
    • D. 3
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    • 7. 
      If X and Y are two sets such that X ? Y has 18 elements, X has 8 elements, and Y has 15 elements, how many elements does X ? Y have?

    • Options
    • A. 5
    • B. 7
    • C. 9
    • D. 11
    • Discuss
    • 8. 
      In a group of 50 people, 35 speak Hindi, 25 speak both Hindi and English and all the people speak Hindi or English or both. The number of people who speak English only is:

    • Options
    • A. 40
    • B. 20
    • C. 15
    • D. 10
    • Discuss
    • 9. 
      If U = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11},
      A = {2, 4, 7},
      B = {3, 5, 7, 9, 11} and
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    • Options
    • A. {7}
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    • 10. 
      Solve the below equation.
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    • A. 8.4
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