<PRE><B>Question 887227</B>
How many four digit numbers greater than 6800 can be formed using the digits 3,5,6,7,8 where repetition of digits is allowed?
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If thousands digit is 8 you get 1*5^3= 125 numbers
If thousands digit is 7 you get 1*5^3 = 125 numbers
If thousands digit is 6 the hundreds digit is 8 you get 1*1*5^2 = 25 numbers
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Ans: 2*125 + 25 = 275 numbers
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Cheers,
Stan H.
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