[tex]\begin{gathered} 1.\text{the number of cards that are divisible by 2 (even) are }20 \\ thus,\text{ the probability is 20/40=0.5} \\ \\ 2.\text{ the number of cards divisible by 5 is 8} \\ \text{ thus the probability is 8/40=}0.2 \\ \\ 3.\text{ the number of cards divisible by 10 is 4} \\ \text{ the probability is 4/40=0.1} \end{gathered}[/tex]
