Part1
a bottle of juice has 1/2 liter of juice. ted buys 3 packs each containing 12 bottles and jason buys 2 packs each containing 6 bottles.
write an expression that represents how many liters of juice ted and jason buy altogether.
a.1/2×12×3×1/2×6×2
b.1/2×12×3+1/2×6×2
c.1/2×12+1/2×6
d.1/2+12+3+1/2+6+2
part 2
calculate how many liters of juice ted and jason buy altogether.

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?