Question

How many three-digit numbers are there with 3
in the unit place?
(i) with repetition
(ii) without repetition
​

Answer 1

$\huge\underline{ \mathbb\red{❥A} \green{n}\mathbb\blue{S} \purple{w} \mathbb \orange{E}\pink{r}}\:$

Total number of three digits numbers which have 3 at unit place and don't have 0 at tens place =8×7=56. Thus, the total number of possible three digit numbers which have 3 at units place without repetition =56+8=64.

Answer 2

Answer:

the answer is without repetition