Question 150427This question is from textbook A survey of mathematics with applications
: Can someone help me please?
9. (6 pts) A couple plan to have exactly three children. (Need line segments? Use these)
(You may also hand draw your work and scan it in and save it in your .doc file,
as a .jpg or .pdf. Your choice.)
(a) Construct a tree diagram and list the sample space.
(b) Find the probability that the family has at least two girls.
This question is from textbook A survey of mathematics with applications
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 9. (6 pts) A couple plan to have exactly three children. (Need line segments? Use these)
(You may also hand draw your work and scan it in and save it in your .doc file,
as a .jpg or .pdf. Your choice.)
(a) Construct a tree diagram and list the sample space.
I'll let you draw the tree.
In the 1st column put "b" and "g" for boy or girl
In the 2nd column put "b" and "g" to the right of each of the column 1 entries
In the 3rd column put "b" and "g" to the right of each of the column 2 entries
(b) Find the probability that the family has at least two girls.
at least two girls: bgg, gbg, ggb, ggg
P(at least two g's)= 4/8 = 1/2
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Cheers,
Stan H.
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