2 3
10
TIME REMAINING
49:09
EERS
Given: sin (A) =
13
:-V13,5 What is tan(A -B)?
o 5 + 12V13
12 - 513
12 - 5/13
5 + 12/13
12 + 5V13
- 5 + 12V13
-5 + 12/13
12 + 513
Mark this and retum
Save and Exit
Next
Submit

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?