En un salón de clases hay 60 alumnos, de esos 40 son mujeres y 20 son hombres.
a. ¿Cuál es la probabilidad de elegir a un hombre en el salón de clase?
b. ¿Cuál es la probabilidad de elegir a una mujer en el salón?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?