1. Based on the given data calculate the probability that selected at random student is a girl OR student likes soccer. See tip for previous problem.

a) 9/80

b) 8/9

c) 9/16

d) 8/15

2. Find probability of 5 successes (x = 5) in 10 trials (n = 10), if probability of success in each trial is p = 0.4. Use Appendix Table for Binomial distribution.

a) 0.431

b) 0.326

c) 0.201

d) 0.108

3. Use Appendix table for Binomial distribution to find probability for n = 4, p = 0.6 and x

a) 0.526

b) 0.431

c) 0.355

d) 0.218

4. Quiz has six questions (n = 6). Each question has 5 possible answers and only one is correct (probability of success = 1/5 = 0.2). If a student randomly guesses on all six questions, what is the probability to answer 2 questions right (x = 2)? Use Appendix table for Binomial distribution.

a) 0.124

b) 0.438

c) 0.328

d) 0.246

5. A fair coin flipped 9 times. Use Appendix Table A for Binomial distribution to find the probability that it lands on heads more than 5 times (5 is not included).

First, figure out what is n, p, x for this case, then use Appendix Table to find each probability, then add them together.

a) 0.500

b) 0.254

c) 0.121

d) 0.042

Football Boys 8 Girls 5 Baseball 7 3 Basketball 20 12 Soccer 15 10