Probability Distribution of Cars Sold

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!


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

Have you covered the Poisson distribution in class?