Answer: Our required probability is 0.3162.
Step-by-step explanation:
Since we have given that
n = 60
Probability of success = 
Probability that at most 39 of these relays come from supplier A would be

Hence, our required probability is 0.3162.
Answer:
I don't know
Step-by-step explanation:
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Answer:7
Step-by-step explanation:
all you have to do is subtract 20-13