Let x represent the number of times a customer visits a grocery store in a one week period.
Assume this is the probability distribution of x:
x 0 1 2 3
p(X) 0.1 0.4 0.4 0.1

Find the expected value of x, the average number of times a customer visits the store.

How do you do this geometry problem

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?