A stopwatch is used to time the motion of a car. In the first 12 s, the car moves 50 meters. In the next 3 s, the car moves 5 m. What is the average velocity of the car?

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