SOLUTION: how many 3-digit numbers can be made with the digits 1,2,3,4,5,6,7 if repetition is allowed (A) and repetition is not allowed (B) ?
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Question 1201691
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how many 3-digit numbers can be made with the digits 1,2,3,4,5,6,7 if repetition is allowed (A) and repetition is not allowed (B) ?
Answer by
ikleyn(52781)
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(A)
= 7*7*7 = 343.
ANSWER
(B) 7*6*5 = 210.
ANSWER
Solved.
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