Alberto gana S/. 855,00 al mes, pero en el mes de setiembre trabaja horas extras y le pagan S/. 532,00 además le dan una gratificación de S/. 808,00 por ser un buen empleado. Si durante ese mes realiza los siguientes gastos: S/. 340,00 en comida, S/. 124,00 en servicios y S/. 1 350 en comprar artefactos. ¿Cuánto dinero le queda?

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.