representar en sistema de cordenada cartesianas los siguientes funciones y devir ¿que tipo es? a) f(×)=2×+1 , b) f(×)=-3ײ-× , c) f(×)=ײ+3 , d) f(×)=-×+2 yomar ×={-2;-1;0;1;2}​

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?