Do you have to regroup to find 523-141?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent. the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244