math

posted by .

Jen,amy,linda,max and jenny are compteting to fill two remaining spots on the chess team. How mant different combinations are possible for filling the two spots?

120,60,20,or 10

  • math -

    Let s = spots and n = number of students

    n! = "n factorial" = product of all numbers n or less

    P = n!/s!(n-s)! = 5!/2!(5-2)!

    5! = 5 * 4 * 3 * 2 *1 = 120
    2! = 2 * 1 = 2
    (5-2)! = 3! = 3 * 2 * 1 = 6

    P = 120/12 = 10

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. finding numbers

    The sum of two positive numbers is 20. Find the numbers if the sum of their squares is as large as possible; as small as possible. What does it mean?
  2. Grade 4 Math

    Mele is feeding some of the many exotic fish that live in the coral reefs off the island of Tonga. This is the largest of a chain of islands in the south Pacific. Mele has brought a cooked banana from home to give to the fish. As the …
  3. Statistics

    Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots?
  4. Math

    Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots?
  5. Chemistry

    Is it possible to distinguish two spots that have the same Rf value but represent different compounds?
  6. MATH

    A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?
  7. Math

    Ann, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at this business each Saturday. How many combinations of two sisters are possible?
  8. math(Ms.Sue)

    5 students are trying out for the debate team. There are 3 available spots for the team.How many combinations of teams can the debate team make My answer is 15 am i right?
  9. math

    A specially made pair of dice has only one- and two-spots on the faces. One of the dice has three faces with one-spot and three faces with two-spot. The other die has two faces with one-spot and four faces with a two-spot. One of the …
  10. Math

    Samuel, Thea, Ling, Jose, and Mark all want to go on the trip. How many different combinations are possible for the remaining 4 spots?

More Similar Questions