What is this expression in simplest form? I2 + I
2
13 - 12 + 2.1 – 2
O A.
27
1
12 + 2
O
ОВ.
1
1 + 2
O C.
11:
-
1
I - 2
1 + 2
12 + 2
O D.

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?