Probability equation

[Steve123]

I have a question that's got me stumped. There are 14 cars that drive past in an hour. I know 21.65% of all cars going past are red. What equation would I use to work out the probability of just one car going past that's red and also the probability that 5 of the 14 cars are red?

 

[Dr.Peterson]

I have a question that's got me stumped. There are 14 cars that drive past in an hour. I know 21.65% of all cars going past are red. What equation would I use to work out the probability of just one car going past that's red and also the probability that 5 of the 14 cars are red?

Have you learned (or can you look up) the binomial distribution?

Whether that applies depends on how you know that "21.65% of all cars going past are red".

 

[Steven G]

If 21.65% of ALL cars are red, then the probability that any one car that passes is red is 21.65%.
I gave you this answer mainly because posted the answer.
Now you get to do the next part.

 

[Steve123]

Have you learned (or can you look up) the binomial distribution?

Whether that applies depends on how you know that "21.65% of all cars going past are red".

Thank you, binomial distribution in Excel got me what I was after.