Q. |
How many even numbers less than 10,000 can be formed with the digits from the digits 1, 3, 4, 5, and 7? |
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A. 41 |
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B. 32 |
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C. 44 |
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D. 16 |
1, 3, 4, 5, and 7
Less than 10, 000 means there can be 1 digit, 2 digits, 3 digits, and 4 digits numbers.
There is only 1 even one-digit number i.e. 4
2 digits: 4 × 1 = 4
3 digits: 4 × 3 × 1 = 12
4 digits: 4 × 3 × 2 × 1 = 24
Total = 1 + 4 + 12 + 24 = 41