monisha19christ
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The bulbs manufactured by a company gave a mean life of 3000 hours with standard
deviation of 400 hours. If a bulb is selected at random, what is the probability it will
have a mean life less than 2000 hours?
Question:
1) Calculate the probability.

Answer :

lakshmidevi258
mean=3000
standard deviation (sd)=400
probability=(mean^2-sd)/2000
             =8999600/2000
           =4499.8

Answer:

Step-by-step explanation:`

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