Frank has a 2-digit number on his baseball uniform. the number is a multiple of 10 and has 3 for one its factors. what three numbers could frank have on his uniform?
a. what do you need to find?
b. what information do you need to use?
c. how can you solve the problem?
d. complete the sentence. frank has a his uniform. the number is a multiple of one factor of the number is frank could have or on his uniform.

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?