From the digits 9, 8, 7, 5, 3, and 1, find the number of positive even integers each consisting of three digits.
a)36
b)25
c)3

Even integers
they alwasy end with an even number
the only listed one is 8

find how may 2 number combos you can make with remaining 5 numbers
assuming you can repeat number
5 options, 2 slots
5*5=25

25 ways

answe ris B