Test results of inspecting the voltage of a product showed that 25% of board failures are caused by design issues, 65% by manufacturing issues and the rest of the failures

are due to mechanical defects. Suppose that 20 products fail independently. Assume that A, B,and C are the numbers of design, manufacturing, and mechanical defects. Find the following: OP(A=B=10) p) P(A=3, C=5) с) Р(В-С-6) ) P(A=0,B=10) P(C=19,A=0)