S1 HelpWatch

#1
Three events A, B and C are defined in the sample space S. The Events A and B are mutually exclusive and A and C are independent.

a) Draw a Venn diagram to illustrate the relationship between the 3 events and the sample space.

Given that P(A)=0.2, P(B)=0.4, and P(A U B)=0.7, find
b) P(A|C)
c) P(A U B)
d) P(C)
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13 years ago
#2
do you know the formulas for your questions?
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13 years ago
#3
(Original post by Bowie88)
Three events A, B and C are defined in the sample space S. The Events A and B are mutually exclusive and A and C are independent.

a) Draw a Venn diagram to illustrate the relationship between the 3 events and the sample space.

Given that P(A)=0.2, P(B)=0.4, and P(A U B)=0.7, find
b) P(A|C)
c) P(A U B)
d) P(C)
A misprint I think ?
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#4
its supposed to be that symbol that looks like a u
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13 years ago
#5
(Original post by Bowie88)
its supposed to be that symbol that looks like a u
They have given you the answer to the question. If you have copied the question correctly then the question itself contains an error.

There is no point in telling you P(AuB)=0.7 and then asking you what P(AuB) equals
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13 years ago
#6
oo I like your exam board. Some sort of comprehension it seems

But seriously, it cant be 0.7, if P(A) = 0.2 and P(B) = 0.4

the union would be 0.2 + 0.4 - 0 (as they are mutually exclusive) ie. 0.6.
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