Asample was taken of the salaries of four employees from a large company. the following are their salaries (in thousands of dollars) for this year. 33 31 24 36 the variance of their salaries .5.1. b.31. c.26.

c.26

Step-by-step explanation:

The mean salary of the sample is:

The variance of a sample is given by:

The variance of their salaries is 26.

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or