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A bus stops every 5 minutes. A passenger needs to wait for 0 to 5 minutes after arriving at the bus stop. How about the probability of waiting no more than 3 minutes?
The waiting time for passengers to arrive at the bus station is 5 minutes at most,
And because the waiting time of passengers is less than 3 minutes,
So the probability that the waiting time of passengers is less than 3 minutes is 3 in 5
A bus stops at a bus stop every 15 minutes and stops for 3 minutes before departure
(1) Probability of waiting time more than 10 minutes (answer: 2 / 15)
(2) Probability of waiting time less than 10 minutes (answer: 13 / 15)
(3) Probability of passengers getting into the station (1 / 5)
After the station starts, stop for 3 minutes and leave the next train after 15 minutes. So there is no train at the station in 12 minutes
1 (12-10)/15=2/15
2 1-2/15=13/15
3 3/15=1/5
A and B start at the same time from a and B, and walk towards each other. A goes to B, and B goes back along the original road after a. the first meeting is 85 km away from a, and the second meeting is 55 km away from B. find the distance between a and B
The first time we met, Jia walked 85 kilometers
The second encounter a walk 85x3 = 255 km
The distance between AB and ab is 255-55 = 200 km
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