21) Simplify:[unparseable or potentially dangerous latex formula]
22) Roland Bones tosses a pair of standard dice. What is the probability that the sum of the top faces of the dice is a prime number?
31) A secant, AP, and a tangent, CP intersect in the exterior of a circle. Point B lies on AP and on the circle such that CP = 16 and BP = 8. Find AB.
39) Find the sum of the series 1 + 2 + 2 + 1[unparseable or potentially dangerous latex formula] + [unparseable or potentially dangerous latex formula] + [unparseable or potentially dangerous latex formula] + ....
41) Hope I. Whenn throws 3 darts at the square target containing 9 congruent smaller squares. Each dart lands in a different small square. What are the odds that the 3 squares the darts land in are the shaded squares?
42) A tub of apples contains red apples and green apples. The probability of selecting a green apple is 25%. If 10 green apples are added to the tub, the probability of selecting a green apple becomes 40%. How many red apples are in the tub?
49) How many elements are in { [unparseable or potentially dangerous latex formula] } ?