Pam laid three times as many tiles on saturday as she laid on sunday. if pam laid 80 tiles over the weekend altogether, how many tiles did she lay on saturday? 20 tiles 27 tiles 54 tiles 60 tiles

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