SOLUTION: How many 5-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6 and 7 if repetition of the digits is not allowed? For example, there can not be 2 7’s
Algebra.Com
Question 526086: How many 5-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6 and 7 if repetition of the digits is not allowed? For example, there can not be 2 7’s
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nPr=n!/(n-r)!
7P5=7!/2!=2,520
.
Ed
RELATED QUESTIONS
How many 4-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7 if... (answered by robertb)
can someone help please
How many 3-digit numbers can be formed using the digits 0, 1,... (answered by SAT Math Tutor)
How many four-digit numbers can be
formed using the digits 1, 2, 3, 4, 5, 6, if the... (answered by mccravyedwin,Edwin McCravy,ikleyn)
1. How many different 4-digit numbers can be formed from the digits 2, 3, 4, 5, 6, 7, and (answered by Alan3354)
How many different 4-digit even numbers can be formed from the digits 1,3,5,6,8, and 9 if (answered by ikleyn)
How many 5 digits number can be formed using the digits 1,2,3,4,5,6,7. If repetition is... (answered by greenestamps)
How many different 3-digit numbers can be formed from the digits 1,3,4,6,7,9 if... (answered by ikleyn)
How many different two-digit numbers can be formed using the digits 1, 3, 4, and 5.... (answered by stanbon)
If repetition is allowed, how many three-digit numbers can be formed using the digits 1,... (answered by Edwin McCravy,ikleyn)