Mathematics, 22.02.2020 01:22 abbbaayyyy1709
When an opinion poll selects cell phone numbers at random to dial, the cell phone exchange is first selected and then random digits are added to form a complete telephone number. When using this procedure to generate random cell phone numbers, approximately 55%55% of the cell numbers generated correspond to working numbers. You watch a pollster dial 1515cell numbers that have been selected in this manner.
What is the mean number of calls that reach a working cell number?
a. 0.550.55b. 1515c. 8.258.25d. 3030
Answers: 1
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