Math - Data Management

If we take a sample of 2400 families with five children,
a) what is the probability that a family will have exactly 2 girls?
b) How many of the families would you expect to have exactly two girls?

  1. 👍 0
  2. 👎 0
  3. 👁 104
asked by Abbey
  1. Binomial distribution gives us

    5C2*(.5)²(.5)³
    =10(.5)^5
    =0.3125

    E(x)=2400*0.3125=750

    1. 👍 0
    2. 👎 0
    posted by MathMate

Respond to this Question

First Name

Your Response

Similar Questions

  1. Designing Specialty Areas

    We show we value families when we do which of the following? A. Tell families that they hold their children's future in their hands, so it's crucial that they make sure their children complete their homework. B. Realize that

    asked by Priscila on April 9, 2017
  2. creative play

    Parents and families need to be involved in assessing children’s growth. Teachers should foster this involvement by all of the following EXCEPT: A. giving parents/families opportunities to provide written feedback on their

    asked by bev on July 14, 2017
  3. math( pls help me out)

    A sample of four families with three children each was taken.find the probability that one family has two girls,two families have three girls and one family has three boys.

    asked by Nadia on April 2, 2016
  4. math

    A sample of four families with three children each was taken.find the probability that one family has two girls,two families have three girls and one family has three boys.

    asked by Nadia on April 2, 2016
  5. math

    A sample of four families with three children each was taken.find the probability that one family has two girls,two families have three girls and one family has three boys.

    asked by farahan on April 2, 2016
  1. probability

    PROBLEM 7: SAMPLING FAMILIES (3 points possible) We are given the following statistics about the number of children in the families of a small village. There are 100 families: 10 families have no children, 40 families have 1 child

    asked by JuanPro on April 29, 2014
  2. Probability

    We are given the following statistics about the number of children in the families of a small village. There are 100 families: 10 families have no children, 40 families have 1 child each, 30 families have 2 children each, 10

    asked by qwerty on April 29, 2014
  3. Probability

    We are given the following statistics about the number of children in the families of a small village. There are 100 families: 10 families have no children, 40 families have 1 child each, 30 families have 2 children each, 10

    asked by A on May 1, 2014
  4. Statistics

    Achusband and wife with brown eyes who have 0.75 probability of having children with brown eyes, 0.125 probability of having children with blue eyes, and 0.125 probability of having children with green eyes. (a) What is the

    asked by Neveah on February 5, 2016
  5. math

    Chances are 50-50 that a newborn baby will be a girl. For families with five children, what is the probability that all the children are girls

    asked by joe on November 24, 2012

More Similar Questions