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# Probability

For #70a, b I know I have to use the complement like
1- (p(all four people with no good blood)) but do I multiply each probability or add them?

For #66 not sure how begin this one

For #63 I feel as if i don't have enough info to start with.

For # 29,29b I get values that are way off the correct answers,
like a) 138783/469491 b) .2965/(107632/156499) ...
i'm probably adding the wrong values. theres just a lot to choose from.

For #39 I would think the answer would just be 70% because its given but no its wrong.

=========================
39 .8235
29 a).4979 b).5144 c).7443 d).4399 e).6894
63 a).216 b).936 c).648
66 .5952
70 .8704

Can you please say which formula you're using if any. It's hard for me to understand problems with percents. We have just covered Bayes rule, conditional probability, multiplicative rule, additive rule, complement and independence.

Is there any book that you recommend for help as well, it would be helpful as well.
Thanks,

#### Solution Preview

Please see the attached file for the complete solution.
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a. There are 46263 motor vehicle related accidents in 1984.
The total number of accident is 92911.
Then the probability that the accident is caused by motor vehicle is
46263 / 92911 = 0.4979.

b. Let event A = motor vehicle accident, and event B = the person is male

c. event C = the person between 15 and 24

d. event D = Fall accident, E = the person over 75

e. there are total of 64053 male accidents among 92911 total accidents. So the probability is
64053 / 92911 = 0.6894

Event X = failed ...

#### Solution Summary

Probability problems are solved for the wrong values.

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