The number of no-shows each day for dinner reservations at the Cottonwood Grille is a discrete random variable with the following probability distribution:
Based on this information,the expected number of no-shows is 1.65 customers.

Question

The number of no-shows each day for dinner reservations at the Cottonwood Grille is a discrete random variable with the following probability distribution:
  Based on this information,the expected number of no-shows is 1.65 customers.

Quizplus · Accepted Answer

This is true as the expected value of a discrete random variable is computed by taking the sum of each possible value multiplied by its probability, which in this case would be (0.15*0)+(0.25*1)+(0.20*2)+(0.30*3)+(0.10*4) = 1.65.

The Number of No-Shows Each Day for Dinner Reservations at the Cottonwood