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.
This is your answer.... all you are doing is substituting what ever the variable is
57. 1/8
58. 1/32
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