Can some one explain how to solve this?

Question

anonymous · Answer

attachment

anonymous · Answer

This sucks but here we go.

anonymous · Answer

chance of failing 0.17, so chance of success is .83

anonymous · Answer

To answer part a and b I would like to know their definition of unusual. Probably wouldn't be unusual that one would fail. But the probablility that both fail is 0.17*0.17

anonymous · Answer

part b. The probability that the system succeeds. It says only one needs to work for it to succeed. So this is one minus the probaility that both fail. So 1-(.17*.17)

anonymous · Answer

The last one we can setup an equation that is very similar to what we just did in part b.

anonymous · Answer

1-(.17)^2 where there is 2 components. that is what we did in part b

anonymous · Answer

1-(.17)^n = .9999 solve for n which is number of components

anonymous · Answer

Did you understand everything?

anonymous · Answer

ok so part a is no?