how many five digit numbers can be formed from the numbers 1,2,3,4,6,7,8 and 9 if repetition of digits is not allowed?
A.6000
B.6500
C.6662
D.6720.
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how many five digit numbers can be formed from the numbers 1,2,3,4,6,7,8 and 9 if repetition of digits is not allowed?
A.6000
B.6500
C.6662
D.6720.
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Answer:
D. 6720
Step-by-step explanation:
Since repetition is not allowed so therefore 8!/3! or 8x7x6x5x4/1x2x3