Find the number of different 3-digit numbers greater than 200 that can be made from the digits {1,2,3,4,5,6,7} if digits may be repeated and the number is divisible by 5.
Number of 3-digit numbers
3(b)Counting Principles CombinatoricsMedium3 marks
Find the number of different 3-digit numbers greater than 200 that can be made from the digits {1,2,3,4,5,6,7} if no digit is repeated and the number is even.