determine the number of combinations of 7 out of 10 items. and then determine the number of combinations of 4 out of 7 items.

  1. 👍 0
  2. 👎 0
  3. 👁 49
asked by howard
  1. n!/(r!(n-r)!)

    10! /(7! * 3!) = 10*9*8/(3*2)=10*3*4 = 120

    7!/(4! * 3!) = 7*6*5/(3*2) =7*5 =35

    1. 👍 0
    2. 👎 0
    posted by Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    26. The law of permutations, combinations, and filling slots are the counting rules used to (a) determine the total number of possible outcomes (b) determine all possible combinations of “n” objects from a total of N objects

    asked by meri on June 30, 2015
  2. statistics

    17. All three‐digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 without repeating the digits are (a) 50. (b) 60. (c) 15. (d) 71. 18. One of the counting rules used to determine the total number of possible

    asked by meri on June 30, 2015
  3. Math - average rate problems(check + help)

    The total cost, c, in dollars of operating a factory that produces kitchen utensils is C(x)=0.5x^2+40x+8000, where x is the number of items produced in thousands. a)Determine the marginal cost of producing 5000itmes and compare

    asked by Anonymous on October 16, 2010
  4. EASY Pre-Algebra

    In the following situation, determine whether you are asked to determine the number of permutations or combinations. Then do the calculation. How many ways can the four offices of chairman, vice chairman, secretary, and treasurer

    asked by Sarah on April 11, 2016

    Evaluate the expression. Determine the number of combinations of 7 things taken 4 at a time. & Mark can remember only the first 4 digits of his friend's phone number. He also knows that the number has 7 digits and that the last

    asked by Jamie on November 23, 2014
  6. COMBINATION!!MATH!!!hurryyy!!!

    Cards are drawn at random from a 52-card deck. Find the number of different 5-card poker hands possible consisting of 3 aces and 2 kings? i don't knw how to do this kind of problems..can anyone teach me??? Forget about the fact

    asked by Katrina on January 5, 2007
  7. Math

    Determine the number of combinations on a bicycle lock that has a 3-digit number combination with only 3 numbers where the numbers can be repeated to open the lock

    asked by Pedro on September 8, 2016
  8. math

    a surplus of 12 items is represented by 12, determine the opposite of that number and describe the measurement indicated by that opposite? I think it is 12 and the opposite is -12, a shortage of 12 items. Is this correct?

    asked by kelley on September 13, 2016
  9. Math

    If I have 4 people and I want to take a picture of them standing side by side, how many total different combinations can I use? If I have 5? if I have 10? Is there a mathematical equation that would figure out the total no matter

    asked by K. on January 31, 2007
  10. Math

    Hi! Can someone check my answers? Thanks!! Directions: Tell whether the following questions are either permutations or combinations. 1.) Number of ways the Junior class can elect a committee of officers - President, Vice

    asked by Callie on April 23, 2015

More Similar Questions