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3. A group of students went on a school excursion. 2 of the students are to be randomly selected from the group to lead the side. If the group has 10 more boys than girls and that there are 756 equiprobable ordered selections, what is the probability that two boys or two girls got selected?

3. A group of students went on a school excursion. 2 of the students are to be randomly selected from the group to lead the side. If the group has 10 more boys than girls and that there are 756 equiprobable ordered selections, what is the probability that two boys or two girls got selected?

Elementary Linear Algebra (MindTap Course List)
Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Matrices
Section2.5: Markov Chain
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Need help 3,4 please with proper explanation
1. Two events have P(A) = P(B|A) = and P(A/B) = Compute P(A n B), P(B), P(A U B). 2. A, B, and C are events with P (A) = 0.3, P(B) = 0.4, and P(C) = 0.5, A and B are disjoint, A and C are independent, and P(BIC) = 0. 1. Find P(AUBUC). 3. A group of students went on a school excursion. 2 of the students are to be randomly selected from the group to lead the side. If the group has 10 more boys than girls and that there are 756 equiprobable ordered selections, what is the probability that two boys or two girls got selected? 4. Plumber Bob does 40% of the plumbing jobs in a small town. 30% of the people in town are unhappy with their plumbers, but 50% of Bob's customers are unhappy with his work. If your neighbor is not happy with his plumber, what is the probability that it was Bob?
Transcribed Image Text:1. Two events have P(A) = P(B|A) = and P(A/B) = Compute P(A n B), P(B), P(A U B). 2. A, B, and C are events with P (A) = 0.3, P(B) = 0.4, and P(C) = 0.5, A and B are disjoint, A and C are independent, and P(BIC) = 0. 1. Find P(AUBUC). 3. A group of students went on a school excursion. 2 of the students are to be randomly selected from the group to lead the side. If the group has 10 more boys than girls and that there are 756 equiprobable ordered selections, what is the probability that two boys or two girls got selected? 4. Plumber Bob does 40% of the plumbing jobs in a small town. 30% of the people in town are unhappy with their plumbers, but 50% of Bob's customers are unhappy with his work. If your neighbor is not happy with his plumber, what is the probability that it was Bob?
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