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  • Question
  • Eight first class and six second class petty officers are on the board of the 56 club. In how many ways can the members elect, from the board, a president, a vice-president, a secretary, and a treasurer if the president and secretary must be first class petty officers and the vice-president and treasurer must be second class petty officers?


  • Options
  • A. 1500
  • B. 1860
  • C. 1680
  • D. 1640

  • Correct Answer
  • 1680 

    Explanation

    Since two of the eight first class petty officers are to fill two different offices, we write 8 P 2 = 56

     

    Then, two of the six second class petty officers are to fill two different offices; thus, we write  6 P 2  =30

     

    The principle of choice holds in this case; therefore, the members have 56 x 30 = 1680 ways to select the required office holders


  • Permutation and Combination problems


    Search Results


    • 1. A team of 8 students goes on an excursion, in two cars, of which one can seat 5 and the other only 4. In how many ways can they travel?

    • Options
    • A. 126
    • B. 240
    • C. 120
    • D. 260
    • Discuss
    • 2. How many number of times will the digit ?7' be written when listing the integers from 1 to 1000?

    • Options
    • A. 243
    • B. 300
    • C. 301
    • D. 290
    • Discuss
    • 3. A certain marathon had 50 people running for first prize, second, and third prize.How many ways are there to correctly guess the first, second, and third place winners?

    • Options
    • A. 2
    • B. 1
    • C. 4
    • D. 3
    • Discuss
    • 4. Find the number of ways to draw a straight, (suit does not matter) beginning with a 4 and ending with a 8?

    • Options
    • A. 1024
    • B. 1296
    • C. 1094
    • D. 1200
    • Discuss
    • 5. A school has scheduled three volleyball games, two soccer games, and four basketball games. You have a ticket allowing you to attend three of the games. In how many ways can you go to two basketball games and one of the other events?

    • Options
    • A. 25
    • B. 30
    • C. 50
    • D. 75
    • Discuss
    • 6. There are 2 brothers among a group of 20 persons. In how many ways can the group be arranged around a circle so that there is exactly one person between the two brothers?

    • Options
    • A. 18! x 19!
    • B. 2 x 19!
    • C. 2 x 18!
    • D. 18! x 18!
    • Discuss
    • 7. In how many ways can the letters of the word 'MISSISIPPI' be arranged ?

    • Options
    • A. 12400
    • B. 11160
    • C. 16200
    • D. 12600
    • Discuss
    • 8. In how many ways, can zero or more letters be selected form the letters AAAAA?

    • Options
    • A. 5
    • B. 6
    • C. 2
    • D. 8
    • Discuss
    • 9. Goldenrod and No Hope are in a horse race with 6 contestants. How many different arrangements of finishes are there if No Hope always finishes before Goldenrod and if all of the horses finish the race?

    • Options
    • A. 720
    • B. 360
    • C. 120
    • D. 640
    • Discuss
    • 10. A committee of 4 people is to be formed from a group of 9 people.How many possible committees can be formed?

    • Options
    • A. 120
    • B. 162
    • C. 126
    • D. 170
    • Discuss


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