Question

Suppose that two employees have to be fired from a group of seven:
• Amy, female, age 35
• Bob, male, age 41
• Chad, male, age 43
• Diana, female, age 44
• Elvis, male, age 49
• Frank, male, age 61
• Ginger, female, age 62


Determine the probability (both as a fraction and a decimal) that the average age of the employees selected is older than 50.

d. Determine the probability that both employees selected are older than 6

Answer 1

xBar > 50
=> {49+61, 49+62, 61+62}
=>
P(xBar>50)=3/7C2=3/28

xBar>60
=> {61+62}
=>
P(xBar>60)=1/7C2=1/28