Question

If you ask three strangers about their birthdays, what is the probability:

Answer 1

Part A:

The probability that the birthday of three strangers were on Wednesday is given by


`\left( (1)/(7) \right)^3= \bold{(1)/(343)}`



Part B:

The probability that the birthday of three strangers were on different days of the week is given by


`\left( (1)/(7) \right)\left( (1)/(6) \right)\left( (1)/(5) \right)= \bold{(1)/(210)}`



Part C:

The probability that none of the three strangers were born on Saturday is given by


`\left( (6)/(7) \right)^3= \bold{(216)/(343)}`