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Counting and Probability

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Wize University Statistics Textbook > Counting Techniques

Counting and Probability

3 Activities

In a group of 10 people, 6 are right-handed and 4 are left-handed. If we choose 4 people at random without replacement, what is the probability that exactly 2 of them are right-handed? Give your answer as a decimal.
More Counting and Probability Questions:
Counting and Probability
In how many ways can we rearrange the letters in the word SEVEN to form a unique string of letters?
Counting and Probability
Six people are right-handed, and 4 people are left-handed. What is the probability of randomly selecting 2 of each?
Probability
A library has 20 math textbooks, 10 French textbooks, and 15 geography textbooks. Cassie checked out 5 textbooks.
[Enter both answers with at least 2 decimal places, e.g. 0.26]
Counting and Probability
Six people are right-handed, and 4 people are left-handed. What is the probability of randomly selecting 2 of each?
Probability
There are 20 DVD’s in the clearance bin at Target, and 40% of them are comedy and 60% of them are dramas.
Counting and Probability
You draw 3 cards from a deck of 52 cards without replacement. Determine the probability that all three of them are of the same colour.
Counting and Probability
You draw 3 cards from a deck of 52 cards without replacement. Determine the probability that none of the cards are hearts.
Probability
Parts (i) to (vi) pertain to the following information:
In order to win a prize, you must flip 'Heads' at least 2 times out of 3 trials. However, the coin is not fair because there is a 40% probability you will flip 'Heads' each time (and therefore 60% probability you will flop 'Tails' each time).
(i) Complete the probability distribution table. Enter 3 decimal places for probabilities.
Probability
(ii) What is the probability that you will win a prize?