Question

Anna counted the number of articles in several different magazines. Number of articles Number of magazines 17 5 23 4 27 3 29 3 36 3 46 2 X is the number of articles that a randomly chosen magazine had. What is the expected value of X? Write your answer as a decimal. Submit O Type here to search o

Answer 1

Expected value is found by

Sum of x• f(x) = ( 5•17 + 4•23 + 3•27+ 3•29+3•36 + 2•46 ) =

. = 85 + 92 + 81 + 87 + 108 + 92= 545

divided by number of magazines

Then answer is

Expected value = 545/20 = 27 articles