Solving Experimental Probability Problems

Solving Experimental Probability Problems

By Jessica Farrow

Multiple Choice

In a class, 18 students each toss a coin 10 times. They record how many times the results is heads. Based on these results, what is the probability of getting more than 5 heads?

• $$\frac{1}{3}$$  

• $$\frac{7}{18}$$  

• $$\frac{2}{3}$$  

• $$\frac{2}{5}$$  

Multiple Choice

Soledad has a spinner with a red, a blue, and a white section. She spins the spinner 20 times. Based on her results, what is the probability of the spinner landing on each color?

• red: $$\frac{1}{4}$$  

  blue: $$\frac{1}{2}$$  

  white: $$\frac{6}{20}$$  

• red: $$\frac{5}{20}$$  

  blue: $$\frac{3}{10}$$  

  white: $$\frac{9}{20}$$  

• red: $$\frac{9}{20}$$  

  blue: $$\frac{3}{7}$$  

  white: $$\frac{3}{10}$$  

• red: $$\frac{1}{4}$$  

  blue: $$\frac{9}{20}$$  

  white: $$\frac{3}{10}$$  

Multiple Choice

Cheryl runs an experiment. She selects a tile at random from a bag of lettered tiles, record the letter, and replaces the tile. Her results are shown below.

A, D, E, B, F, C, F, D, E, B, A, B

Based on the results, what is the probability of selecting a vowel?

• $$\frac{2}{3}$$  

• $$\frac{1}{3}$$  

• $$\frac{1}{4}$$  

• $$\frac{5}{12}$$  

Multiple Choice

Last season, Erik made 21 of the 35 free throws he attempted. Suppose he attempts 50 free throws this season. What is the most reasonable prediction of the number of free throws he will miss?

• 28

• 20

• 11

• 30

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