encontrar la longitud de los lados de un triangulo isosceles sabiendo que el perimetro es igual a 60m y que el lado desigual mide el doble mas 4m que uno de los lados iguales

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