A sample space has only three points a1,a2,a3.if a1 is likely to occur as a2 and a3 is twice as likely to occur as a3 then p(a3) is
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Answer:
1/5
Step-by-step explanation:
only 3 points means
P(a1)+P(a2)+P(a3)=1
P(a1) = P(a2)
P(a2) = 2P(a3)
P(a1) = 2P(a3)
now, P(a1)+P(a2)+P(a3) =1
2P(a3)+2P(a3)+P(a3) = 1
5P(a3) = 1
P(a3) = 1/5
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