IB App Probability Review

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?

Give your answer as a fraction!

Which one is the sample space for flipping 3 coins?

• {H, T}

• {H1, H2, H3, T1, T2, T3}

• {HHH, TTT, HTH, THT, TTH, HHT}

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

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

• 1/2

• 1/3

• 3/6

• 2/6

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

• 3/10

• 3/9

• 1/9

• 1/3

A survey asked 600 people for their favorite genre of book. The table shows the data. How many people surveyed responded with a genre other than one of those​ listed? Find the probabilities for a complete probability model for the responses.

• 270

• 168

• 132

• 315

Answer using a non-simplified fraction.

P(6th grade | guitar)

Mathematical Equivalence

OFF

Find the expected value. READ CAREFULLY!

• 4.5

• 25.5

• 3.825

• 6.52

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?

• 0.1260

• 0.6203

• 0.2156

• 0.0896

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?

Which of the following cannot be the probability of an event?

• 17⁄16

• 0.1

• 3%

• ⅓