5. In an industry, three machines A, B and C produce stainless steel tumblers of 2:5:3 of the total production. Past experience revealed that machine A produce 4 defectives in every 50, machine B produce 1% defectives, and machine C produce 2 defectives in every 60 units. One tumbler was drawn at random from a day’s output and found to be defective. Find the probability that it was produced by machine C