Question

2. Form all the possible two digit numbers with the given digits (With repetition of digits).
One has been done for you.
2,3 -
23.32.22.33
5,6 =
8,2 m
.
1,9
7,4​

Answer 1

Answer:

1,2,5,7,8 and 9. Thus, we have 6 numbers. Then we want to form two-digit numbers without repetition. There are 6 number that is possible to occupy first digit, right? 1,2,5,7,8 or 9. Because it’s without repetition, so the number that have been filled the first digit cannot be the second digit. Thus, the numbers that possible to occupy second place are 5 digits. Thus, there are 6 x 5 = 30 numbers that can we form from those 6 numbers: 1,2,5,7,8 and 9 without repetition.