20 POINTS!!! Word problem: Marlon challenged her best friend, Lauren, to make a list of all the four digit numbers she could think of that have the digits nine, seven, five, and one. How many numbers should Lauren find? Please show work:
The first digit could be 9 7 5 or 1 The 2nd digit could be 9 7 5 or 1 The third digit could be 9 7 5 or 1 The fourth digit could be 9 7 5 or 1 4 possibilities * 4 * 4 *4= 256 possibilities
