Answer: For Part A, there are 9,604 possibilities. For Part B, there are 1,440 possibilities.
To find the total number of possibilities, we will use the Fundamental Counting Principle. To do this, we find the number of possibilities for each position and then multiply them.
For Part B: There are only 4 possibilities for the first position, since it must be odd (1, 3, 5, 7). The for the next 4 digits, all 7 numbers are a possibility.
4 x 7 x 7 x 7 x 7 = 9604
For Part B: We again start with 4, however the numbers can be repeated. So we reduced the number of choice by 1 each time. 4 x 6 x 5 x 4 x 3 = 1440
You can multiply 16 times what equls 88 and then divide by 4 much more simple than it sounds and also your in high school and u cant solve this problem