The answer is .024 im just not too sure how to get it Question 20. 4 pts] In the

Question

The answer is .024 im just not too sure how to get it

Question 20. 4 pts] In the summer, John tends to travel a lot. John's travel time from lowa City to Davenport is normally distributed with a mean of 55 minutes and a standard deviation of 3 minutes. His travel time from Davenport to Chicago is normally distributed with a mean of 160 minutes with a standard deviation of 7 minutes. 20. Assuming the two travel times are independent, what is the probability that the lowa City to Chicago trip takes less than 200 minutes?

Explanation / Answer

here total mean time from Iowa to Chicago =55+160=215

and std deviaiton =(32+72)1/2 =7.6158

therefore probability that trip takes less than 200 minues=P(X<200)=P(Z<(200-215)/7.6158)=P(Z<-1.9696)

=0.024

please revert for any clarificaiton required

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