IB Basic Probability

Front

Sample space for flipping 3 coins?

Back

{HHH, TTT, HTH, THT, TTH, HHT, HTT, THH}

Front

Roll a die one time. Find P(even number).

Back

1/2

Front

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

Back

1/3

Front

Find the expected value. Options: 4.5, 25.5, 3.825, 6.52

Back

4.5

Front

Chelsea surveyed a sample of students in the senior class to determine the distribution of students with a driver’s license. What is the probability a randomly selected student has no license? Options: 32/120, 4/15

Back

32/120, 4/15

Front

Use the table which gives the number of passengers from the Titanic who survived or died and their cabin class. What is the probability that the passenger survived and is from 2nd class? Options: 0.1260, 0.6203, 0.2156, 0.0896

Back

0.0896

Front

The probability of Johnny Snazpants guessing correctly on the IB exam is 34% on each question. If there are 50 questions, how many should he expect to get correct?

Back

17

Front

Which of the following cannot be the probability of an event? Options: 17⁄16, 0.1, 3%, ⅓

Back

17⁄16

Front

A bag contains 5 red, 3 green, and 5 black balls. A ball is drawn at random from the bag. Find the probability that the ball is not red.

Back

8⁄13

Front

There are 27 marbles in a bag. 7 are red, 3 are green, 10 are blue, and the rest are yellow. If you draw from the bag 100 times and replace the marble each time, how many yellow should you expect to draw?

Back

26