How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(rep

Question

How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?

Options:

A . 360

B . 60

C . 300

D . 180

Answer: Option A
THE GIVEN DIGITS ARE SIX.
THE NUMBER OF FOUR DIGIT NUMBERS THAT CAN BE FORMED USING SIX DIGITS IS ⁶P₄ = 6 * 5 * 4 * 3 = 360.

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