Jordan interviewed her 30 classmates on whether or not they played video games and if they drink soda. she displayed her results in the two-way table shown. which statement is true?
a) about 67% of her classmates play video games.
b) more than half of her classmates drink soda and play video games.
c) there is a greater percentage of students who don't play video games then those who don't drink soda.
d) the same percentage of students who don't play video games and don't drink soda as those who don't play video games and drink soda.

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?