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(Solved) Math 245 Written Homework 4 Due May 2nd Name: 1. Suppose in an office of 80 people, 50 put creamer in their coffee and 40 take their coffee with


Please answer that whole 3 parts questions for Probability. If answer are all correct, I will give some tips!

Math 245 Written Homework 4 Due May 2nd Name: 1. Suppose in an office of 80 people, 50 put creamer in their coffee and 40 take their coffee
with sugar. 30 people like both creamer and sugar in their coffee.
(a) Draw a Venn Diagram for this situation. (b) Given that someone likes creamer in their coffee, what is the probability they will also
have sugar? (c) Are the events C = ”person likes creamer in their coffee” and S = ”person likes sugar
in their coffee” independent? Why or why not? 1 2. An experiment consists of flipping coins. Let E be the event ”both H and T occur” and
let F be the event ”at least 1 H”. Find out whether or not the E and F are independent
by finding P (E ∩ F ) and P (E) × P (F ) and comparing the results.
(a) The coin is flipped 3 times. (b) The coin is flipped 4 times. 2 3. Given a sample space S with n(S) = 100, tell whether each pair of events are independent,
mutually exclusive, both or neither:
(a) E and F where n(E) = 60, n(F ) = 40, n(E ∩ F ) = 0 (b) A and B where n(A) = 50, n(B) = 50, n(A ∩ B) = 25 (c) C and D where n(C) = 0, n(D) = 20, n(C ∩ D) = 0 (d) G and H where n(G) = 30, n(H) = 50, n(G ∩ H) = 20 3

 


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