B CLASS
A
C С
BOYS
16 13 13
GIRLS
22 18
The table above shows three classes A, B
and C in a certain school. The three classes
are put together to select a prefect. What is
the probability that the prefect will be:
(a) a boy?
(b) a girl in class B?​

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

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?

Proportions in triangles solve for x