Simplify 6r · s · 4rt. 10rst 10r2st 24r2st

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

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?