## Question 941:

Problem 3: A group of college students were surveyed to learn how many times they had visited a dentist in the previous year. The probability distribution for Y, the number of visits, is given by the following tableY (No. visits) Probability

0 0.15

1 0.50

2 0.35

Total 1.000

1. what is the mean of Y?

2. what is the variance and standard deviation of Y?