
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Please answer this, Thank you!
Note: Page six(6) that are mentioned in the question D can be found in the 2nd photo.

Transcribed Image Text:D. Page 6 of this lesson included a table summarizing the gender outcomes
for a couple planning to have three children.
_13. Construct a similar table for a couple planning to have two
children.
_14. Assuming that the outcomes listed are equally likely, find the
probability of getting two girls.
15. Find the probability of getting exactly one child of each gender.

Transcribed Image Text:EXAMPLE:
On an ACT or SAT test, a typical question has 5 possible answers. If an
examinee makes random guess on one such question, what is the probability
that the response is wrong?
SOLUTION:
There are 5 possible outcomes or answers, and there are 4 ways to answer
incorrectly. Random guessing implies that the outcomes are equally likely,
so we apply the classical approach to get
4
P(wrong answer) = =
= 0.8
EXAMPLE:
Find the probability that when a couple has 3 children, they will have
exactly 2 boys. Assume that boys and girls are equally likely and that the
gender of any child is not influenced by the gender of any other child.
SOLUTION:
The biggest obstacle here is correctly identifying the sample space. It
involves more than working only with the numbers 2 and 3 that were given
in the statement of the problem. The sample space consists of 8 different
ways that 3 children can occur, and we list them in the margin. Those 8
outcomes are equally likely, so we use Rule 2. Of those 8 different possible
outcomes, 3 correspond to exactly 2 boys, so
1st 2nd 3rd
boy-boy-boy
boy-boy-girl
eхаctly
+ boy-girl-boy
2 boys
boy-girl-girl
girl-boy-boy
girl-boy-girl
girl-girl-boy
girl-girl-girl
P(2 boys in 3 births) =
3
= 0.375
INTERPRETATION: There is a 0.375 probability that if a couple has 3
children, exactly 2 will be boys.
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