The high school dance team is holding auditions to fill the spots of four members that graduated. if 10 people try out for the 4 positions, and order does not matter, how many possible combinations exist? a) 160 b) 210 c) 5,040 d) 52,302

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

What are the solutions to the equation 4x2+3x=24-x

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?