How many five digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is...
How many five digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?
Answer/Solution
720
Steps/Work
The given digits are six.
The number of four digit numbers that can be formed using six digits is
6P5 = 6 * 5 * 4 * 3 * 2
= 720.
Answer: B
The number of four digit numbers that can be formed using six digits is
6P5 = 6 * 5 * 4 * 3 * 2
= 720.
Answer: B