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A six-digit number starts with a number between 6-9 in the first position, with no...

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Calculus

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A six-digit number starts with a number between 6-9 in the first position, with no restrictions on the remaining 5 digits.a) Find the probability that a randomly-chosen phone number contains all different digits.b) Find the probability that a randomly-chosen phone number contains at least one repeated digit.a) Write an expression that models the probability. Select the correct choice below and fill in the answer box(es) within your choic(Type whole numbers.)O A.O C.105P51 105The probability that a randomly-chosen number contains all different digits is.(Round to four decimal places as needed.)CELLEb) The probability that a randomly-chosen number contains at least one repeated digit is(Round to four decimal places as needed.)OB.O D..P51051P5

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