X is a normally distributed random variable with mean 51 and standard deviation 24. What is the probability that X is between 3 and 99?

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad