SOLUTION: How many different three digit numbers greater that 240 can be
formed by using three different digits form the set {1, 2, 3, 4} ?
(A)24 (B) 16 (C) 14 (D) 12 (E) 10
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Question 226427: How many different three digit numbers greater that 240 can be
formed by using three different digits form the set {1, 2, 3, 4} ?
(A)24 (B) 16 (C) 14 (D) 12 (E) 10
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
List all permutations of {1,2,3,4}:
123, 124, 132, 134, 142, 143, 213, 214, 231, 234, 241, 243, 312, 314, 321, 324, 341, 342, 412, 413, 421, 423, 431, 432,
Pick out numbers greater than 240:
241, 243, 312, 314, 321, 324, 341, 342, 412, 413, 421, 423, 431, 432,
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