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# Probability

The animal colony in the reseach department contains 20 male rats and 30 female rats. Of the 20 males, 15 are white and 5 spotted. Of the 30 females, 15 are white, and 15 are spotted. Suppose that you randomly select 1 rate from this colony:

a)Find the Joint probability table including the marginal probability.
b) what is the probability of obtaining 1 female
c)what is the probability of obtaining a white male
d) which selection is more likely; a spotted male or a spotted female.
e)Given that a rat is female, what is the probability that it is spotted.

#### Solution Preview

&#12288; White Spotted Total
Male 15 5 20
Female 15 15 30
Total 30 20 50

a)Find the Joint probability table including the marginal probability.
Prob White Spotted ...

#### Solution Summary

The animal colony in the reseach department contains 20 male rats and 30 female rats. Of the 20 males, 15 are white and 5 spotted. Of the 30 females, 15 are white, and 15 are spotted. Suppose that you randomly select 1 rate from this colony:

a)Find the Joint probability table including the marginal probability.
b) what is the probability of obtaining 1 female
c)what is the probability of obtaining a white male
d) which selection is more likely; a spotted male or a spotted female.
e)Given that a rat is female, what is the probability that it is spotted.

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