The chances of three independent events X, Y, Z occurring are \( \frac{1}{2} \), \( \frac{2}{3} \), \( \frac{1}{4} \) respectively. What are the chances of ...

Assessment: JAMB UTME - Mathematics - 1993 Subject: General Mathematics

Question 1 Report

The chances of three independent events X, Y, Z occurring are \( \frac{1}{2} \), \( \frac{2}{3} \), \( \frac{1}{4} \) respectively. What are the chances of Y and Z only occurring?

Answer Details
Chance of x =  1 2
Change of Y =  2 3
Chance of Z =  1 4
Chance of Y and Z only occurring
= Pr (Y ? Z ? Xc)
where Xc = 1 - Pr(X)
1 =  1 2  = 1 1 2
= Pr(Y) x Pr(Z) x Pr(Xc)
=  2 3  x  1 4  x  1 2
= 

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