How many tow-digit integers exist such that all their digits are even?	Choose the correct choice from the following answers:
A) 20
B) 100
C) 120
D) 125
E) 135
0 is also an even integer   so last digit can be filled in 5 ways- 0,2,4,6,8   for both second and third digit there are 5 possibilities-   5 X 5 = 25   _______________   The first digit can be any of the four: 2, 4, 6, or 8. For both seconddigits, there are 5 possibilities. The answer is 4∗5=20.   The correct answer is 20
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How many tow-digit integers exist such that all their digits are even?