Finding the proportions p and q

In a study of 100 new cars, 31 of them were white. Find p and q where p is the proportion of new cars that is white.

a. p=0.31, q=0.69
b. p=0.69, q=0.31
c. p=0.69, q=0.69
d. p=0.31, q=0.31

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