A factory has two machines and that produce and of the total output

MATHEMATICS · Single correct · CBSE · Mathematics · Probability · Probability

Problem

A factory has two machines

A

and

B

that produce

60\%

and

40\%

of the total output, respectively. The defect rates are

3\%

for machine

A

and

5\%

for machine

B

. Find the probability that a randomly selected item is defective. (a) 0.048 (b) 0.030 (c) 0.038 (d) 0.042