Question 770551: The number of three digit or four digit even numbers that can be formed from the numbers 2, 3, 5, 6, 7 is
Answer: 72
4 3 2 + 4 3 2 2 "I don't understand this, why they uses 4, 3, 2 and 4 3 2 2"
Answer by oscargut(2103)   (Show Source):
You can put this solution on YOUR website! The number of three digit or four digit even numbers that can be formed from the numbers 2, 3, 5, 6, 7 is
Answer: 72
4(3)(2)=24 counts the number of 3 digits even numbers
4(3)(2)(2)=48 counts the number of 4 digits even numbers
also digits must be different
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Thanks
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