SOLUTION: How many numbers less than 300 can be formed from the digits 1,2,3,4 and 5 a) If repetitions are not allowed? b) repetitions are allowed?

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 Click here to see ALL problems on Probability-and-statistics Question 481946: How many numbers less than 300 can be formed from the digits 1,2,3,4 and 5 a) If repetitions are not allowed? b) repetitions are allowed?Answer by stanbon(57356)   (Show Source): You can put this solution on YOUR website!How many numbers less than 300 can be formed from the digits 1,2,3,4 and 5 a) If repetitions are not allowed? left-most digit 2 ways Remaining 2 digits: 4C2 = 6 Total: 2*6 = 12 numbers -------------------------------- b) repetitions are allowed? left-most digit: 2 ways Remaining 2 digits: 4^2 = 16 Total: 2*16 = 32 numbers ================================ Cheers, Stan H.