I need help with math problems 2-30 Someone please help

Answer this question! 30 points and brainliest! only if you know the answer.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?