Posted by **juan777** on Monday, January 23, 2012 at 12:29am.

A couple intends to have four children. Assume that having a boy and girl is equally likely event.

a) List sample space

b) Find the probability that couple has two boys and two girls;

c) Find the probability that couple has at least one boy

- math -
**Reiny**, Monday, January 23, 2012 at 9:01am
finish the chart

BBBB

BBBG

BBGB

BBGG

.....

GGGG --- you should have 16 of these

count the number of cases for each of your events,

then divide by 16 to the prob.

- math -
**LOL**, Saturday, February 15, 2014 at 2:49pm
5. A couple plans to have 3 children. Find the possible ways the couple can have 3 children.

- 1a3b+3a2b1+3a1b2+1 a0b3

1a3= 1 case with boy, boy, boy

3a2b1= 3 cases with 2 boys and a girl

3a1b2=3 cases with a boy and 2 girls

1b3= 1 case of girl, girl and girl.

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