Probability Distribution of Cars Sold

#1
Hi, I'm struggling with where to go with the following problem:

The probability distribution below is representative of x, the number of cars sold within a single day.

x = 0, 1, 2, 3, 4
P(x) = 0.1, 0.4, 0.3, 0.2

I calculated the standard deviation and mean, which I believe 0.917 and 1.6 respectively.

The part I am struggling with is:

Finding the probability of two randomly selected days having sold less than 3 cars.

Selecting 100 random days, what is the probability of at most 50% selling exactly one car?

And with 50 randomly selected days, the probability that the average # of cars sold is less than two.


I am not sure if I am overthinking this problem but I am not sure how to solve. Any help would be appreciated!
 

hlsmith

Less is more. Stay pure. Stay poor.
#2
Can you post the exact original question in its entirety!

Have you covered the Poisson distribution in class?