Edriennefaithmartireidn
Answered

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CAN SOMEONE HELP ME WITH THIS MATH QUESTION PLEASE.

How many five digit positive numbers can be formed out of the first seven counting numbers if repetition of digits is not allowed?​

Sagot :

Tacanceaidn

Answer:

first of all, it is a sample problem for permutation.

if n= 7 ; r = 5

P(n,r)=n! /(n-r)!

P(7,5)=7!/(7-5)!

=7!/2!

=7*6*5*4*3*2*1/2*1

=7*6*5*4*3

P(7,5) =2520

therefore, their are 2,520 ways a five digit positive number can be formed

Step-by-step explanation:

HOPE ITS HELPFUL