Conditional probability: check 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
A group contains 100 people. 28 belong to A, 44 belong to B, and 16 belong to both.
Find P(A|B).
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: review variant 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
A group contains 104 people. 29 belong to A, 46 belong to B, and 17 belong to both.
Find P(A|B).
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: check 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
A group contains 104 people. 29 belong to A, 46 belong to B, and 17 belong to both.
Find P(A union B).
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: review variant 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
A group contains 108 people. 30 belong to A, 48 belong to B, and 18 belong to both.
Find P(A union B).
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: check 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 16 red and 3 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: review variant 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 17 red and 4 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: check 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 17 red and 4 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Conditional probability: review variant 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 18 red and 5 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.