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Probability_27th May (Wed)

Last updated almost 5 years ago

5 questions

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Question 1

1.

Attempt Examples 18 and 19.
For more instructions, go here.

Question 2

2.

Attempt the Toolkit activity on The Monty Hall Problem.
For more instructions, go here.

Question 3

3.

Question 4

4.

Question 5

5.

The weatherman might state that your area has a probability of rain of 40 percent. However, this fact is conditional on many things, such as the probability of…
…a cold front coming to your area.
…rain clouds forming.
…another front pushing the rain clouds away.
We say that the conditional probability of rain occurring depends on all the above events.

Share with us your own example.

Example 1
In a group of 100 sports car buyers, 40 bought alarm systems, 30 purchased bucket seats, and 20 purchased an alarm system and bucket seats. If a car buyer chosen at random bought an alarm system, what is the probability they also bought bucket seats?

0.1

0.3

0.5

0.7

Example 2

What is the probability a randomly selected person is male, given that they own a pet?

41%

47.7%

86%