Item 1.7.5.c.

We need 3 or more even digits. 3 even digits: \({5 \choose 3}2^3 2^2\text{.}\) 4 even digits: \({5 \choose 4}2^4 2\text{.}\) 5 even digits: \({5 \choose 5}2^5\text{.}\) So all together: \({5 \choose 3}2^3 2^2 + {5 \choose 4}2^4 2 + {5 \choose 5}2^5\) numbers.