complete the table and BOX THE MEAN, VARIANCE AND STANDARD DEVIATION. show complete solution

A financial executive believes that each savings account customer has, on average, tw credit cards. The following distribution represents the number of credit cards people ow Find the mean, variance, and standard deviation. Is the financial executive correct? Number of credit cards x 0 1 2 3 4 Probability P(x) 0.08 0.50 0.05 0.19 0.18