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If fire fighters response time to an emergency call is normally distributed with a mean of 9 minutes and a standard deviation of 2 minutes. Determine the percent of emergency calls with a firefighter response time:
(a) Between 7 and 11 minutes (b) Less than 12.2 mins (c) At least 7.8 minutes


Sagot :

Answer:

Step-by-step explanation:

A

I’m pretty sure it’s A but I’m not positive sorry if I’m wrong but that’s the answer I would put