# Question: Determine whether each of the following is a valid probability

Determine whether each of the following is a valid probabilitydistribution.

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The random variable X has the following probability distribution.Find the following probabilities.a. P(X > 0)b. P(X ≥ 1)c. P(X ≥ 2)d. P(2 ≤ X ≤5)Refer to Exercise 7.20. If the pizzeria makes a profit of $3 per pizza, determine the mean and variance of the profits per student.A shopping mall estimates the probability distribution of the number of stores mall customers actually enter, as shown in the table.Find the mean and standard deviation of the number of storesentered.When food is irradiated with gamma rays from a cobalt-60 source, does the food become radioactive? Defend your answer. There are four activities along the critical path for a project. The expected values and variances of the completion times of the activities are listed here. Determine the expected value and variance of the completion time ...Post your question