Question

Bag A contains black balls and white balls

Answer 1

Using the probability of complementary events, it is found that q = 0.25.

What is a probability?

A probability is given by the number of desired outcomes divided by the number of total outcomes.

When two events are complementary, the sum of their probabilities is of 1.

For this problem, black balls and white balls are complementary, hence:

p + q = 1.

We have that p = 3q, hence:

3q + q = 1

4q = 1.

q = 1/4

q = 0.25.

More can be learned about probabilities at brainly.com/question/14398287

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