A company sources its batteries from two factories

MATHEMATICS · Subjective · A Level · Mathematics · Probability · Probability

Problem

A company sources its batteries from two factories,

F_1

and

F_2

. The probability that a randomly chosen battery comes from

F_1

0.6

and from

F_2

0.4

. The probability that a battery is defective is

0.03

when it comes from

F_1

and

0.05

when it comes from

F_2

. Find the probability that a randomly selected battery is defective.