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CocaineSuperstargo
Answered

How many 2-digit numbers can be formed from the numbers 1, 2, 3, 4, 5, and 6 if the digits are to be repeated. ​

Sagot :

Answer:
Step-by-step explanation:

Think about it in two ways.

First, these 2 digits are different. Than we have

P(5,2)=5!/3!=20

Secondly, these 2 digits are the same. Than we have

C(5,1)=5

Therefore, there are 20+5=25 2 digits number are satisfactory.

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