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part a
what is the area of triangle i? show your calculation.
part b
triangles i and ii are congruent (of the same size and shape). what is the total area of triangles i and ii? show your calculation.
part c
what is the area of rectangle i? show your calculation.
part d
what is the area of rectangle ii? show your calculation.

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?