Question

Jane Peterson has taken Amtrak to travel from New York to Washington, DC, on ten occasions, of which five times the train was late. Therefore, Jane tells her friends that the probability that this train will arrive on time is _______.

(Express your answer in decimal form, and round your answer to 1 decimal place. If you got .57843 for your answer, type .5)

Answer 1

Given that,

Out of 10 occasions five times train was late.

p ( train was late) = number of time train late / Total number of occasions

= 5 / 10 = 0.5

p ( train will arrive on time) = 1 -  p ( train was late)

= 1 - 0.5

= 0.5