Respuesta :
Answer:
The number of two-digit, positive integers that can be formed from the digits 1, 3, 5, and 9, if no digit is repeated are:
12
Step-by-step explanation:
We are asked to find the number of two-digit number that can be formed using the digits:
1,3 ,5 and 9
We know that the number of such digits possible are:
4×3=12
( Since at the first place there are 4 choices as any of the 4 numbers could come at the first place and also at the second place there are a choice of 3 numbers as the digit's can't be repeated )
Hence, the answer is:
12
