00:00 Two trains are traveling at a constant rate. Which train has the greater speed?
Train B
3001
Train A
Distance (mi)
200
Time (h)
2 3 4 5
Distance (mi) 120 180 240 300
100
х
0
0
2
4

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?