Dishwasher detergent is sold in individual packs. It is sold in 20-, 60-, and 90-pack containers. With no other info provided, which container do you think has the lowest unit rate of dollars per pack? Why?

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