Question

The amount of time required for acertain type of car repair at service garage is normally distributed with mean of 45vminuite and srandard deviation of 80 minuite the service manage plan to have work work begin on acustomer car 10 minuite sfter the car is dropped off snd he tells the customer thst the each eill be ready eihin 1 hour total time .What is the required working time allotment such that there is 90% chance that the repair will be completed within that yime

Answer 1

Answer:

this question answer is 2 hour