math

posted by .

a political discussion group consists of five Democrats and six Republicans. Four people are selected to attend a conference.

A.in how many ways can four people be selected from this group of eleven?

B.In how many ways can four Republicans be selected from six Republicans?

C.find the probability that the selected group will consist of all Republicans?

  • math -

    the answer is "C"

  • math -

    Thanks, but i need the answer to all three questions

  • math -

    A) choose 4 from 11 which is C(11,4) or 330

    b) choose 4 from 6 which is C(6,4) or 15

    c) assuming that your group still consists of 4 people
    prob = 15/330 = 1/22

  • math -

    thank you

  • math -

    A. 11 x 10 x 9 x 8/(4 x 3 x 2 x 1) = 330

    B. 6!/(4!*2!) = 15

    C. (6/11)*(5/10)*(4/9)*(3/8) = 0.04545

  • math -

    What is the cost of concrete for a walkway that is 15 feet long, 8 feet wide, and 9 inches deep if the concrete costs $30 per cubic yard?

  • math -

    $100

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math (statistics)

    There are 15 qualified applicants for 5 trainee positions in a fast-food program. How many groups of trainees can be selected?
  2. Business Statistics

    A company employs 10 people and plans to select a group of 4 of these employees to receive advanced training. How many ways can the group of four employees be selected?
  3. statistics

    A company employs nine people and plans to select a group of six of these employees to receive advanced training. How many ways can the group of six employees be selected?
  4. math

    A company employs six people and plans to select a group of two of these employees to receive advanced training. How many ways can the group of two employees be selected?
  5. Math

    1. How many ways can I select 10 people to attend a conference if 4 must be Republicans and 6 must be Democrats if there are 10 Republicans and 15 Democrats?
  6. statistic

    here are five seniors in a class, for each situation, write how the binomial formula is used to calculate the probability. a) In how many ways can you choose one senior to represent the group?
  7. math, permutations and combination

    1. A group of 25 lecturers include six mathematician. In how many ways can a committee of 4 be selected from this group to include at least one mathematician?
  8. Math

    In how many ways can a subcommittee of six be chosen from a Senate committee of four Democrats and six Republicans if (a) All members are eligible?
  9. Math 120

    A city council consists of eight Democrats and seven Republicans. If a committee of six people is​ selected, find the probability of selecting three Democrats and three Republicans.
  10. Mathematics for social science

    1.There are 20 people in a club. In how many ways can the club elect a president, a secretary and a treasurer, on person can hold more than one office?

More Similar Questions