MATHEMATICS · Multi-part · CBSE · Mathematics · Probability · Probability
Problem
A newspaper printer has three presses A, B, and C which print 30%, 40%, and 30% of daily production respectively. Due to the age of the machines, the presses will produce streaks on their output 3%, 5%, and 7% of the time, respectively.
(a) Find the probability that a randomly chosen newspaper does not have streaks.
(b) If a randomly chosen newspaper does not have streaks, find the probability that it was printed by press A.
(c) If a randomly chosen newspaper has streaks, find the probability that it was printed by either press A or C.