The tread life of tires mounted on light duty trucks follows the normal probability distribution with a mean of 60,000 miles and a standard deviation of 4,000 miles. suppose you bought a set of four tires, what is the likelihood the mean tire life of these four tires is more than 66,000 miles?

 0.0013

Step-by-step explanation:

Given : The test scores are normally distributed with

Mean :

Standard deviation :

Sample size :

The formula to calculate the z-score :-

For x = 66,000

The p-value =

Hence, the likelihood the mean tire life of these four tires is more than 66,000 miles = 0.0013

60 boxes

Step-by-step explanation:

Volume of godown = l*b*h

=(72*60*24)m³

Volume of 1 box = (12*12*12)m³

Number of boxes that can be fit in godown= volume of godown/volume of 1 box

= (72*60*24)m³/(12*12*12)m³

= 103680/1728

= 60

Hope it helps