A quality inspector at a valve manufacturer randomly selects one valve from each batch of fifty valves to inspect for noncompliance. The first batch of fifty valves has five non-compliant ones. The second batch of fifty valves has four non-compliant valves.

Find the probability that the inspector selects a non-compliant valve both times.

Question

A quality inspector at a valve manufacturer randomly selects one valve from each batch of fifty valves to inspect for noncompliance. The first batch of fifty valves has five non-compliant ones. The second batch of fifty valves has four non-compliant valves. 

Find the probability that the inspector selects a non-compliant valve both times.

anonymous · Answer

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anonymous · Answer

I don't know if I should add or  multiply the probabilities.

anonymous · Answer

@DJthereal you know how to do this ?

anonymous · Answer

i can try but i promise nothing

anonymous · Answer

@david111 can you help with this ?

anonymous · Answer

so the fraction is 4/50 and 5/50 i guess u want the percentage?

anonymous · Answer

No i need to know do i multiply or add ?

anonymous · Answer

hmm conspiracy theory

anonymous · Answer

This was so hard to read, at some points my brain was trying to fix your sentences.

anonymous · Answer

@david111 what ?