in a road paving process asphalt mix is delivered to the hopper of paver by trucks that haul the material from batching plant.truck haul time is found to have a bell shaped distribution with mean value of 8.46 min and a standard deviation of .91min..??
(A)about what proportion of all deliveries will take between 7.55 and 9.37 minutes..??
(B)about what percentage of deliveries will take longer than 10.28 minutes..??
explain detail..??
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