A TV set contains five circuit boards of type A, five of type B, and four of type C. The probability of failing in it's first 5000 hours of use is 0.03 for a type A circuit board, 0.04 for a type B circuit board, and 0.03 for a type C circuit board. Assuming that the failures of the various circuit boards are independent of one another, calculate the probability that no circuit board fails in the first 5000 hours of use.