Suppose that 6% of the people with blood group O are left handed and 10% of those with other blood groups are left handed, 30 % of the people have blood groups O. If a left handed person os selected at random, what is the probability that he/she will have blood group O?

Explanation

`E_{1}=` person selected is of blood group O


`E_{2}= `person selected is of other group


`H=` selected person is -handed

`
therefore P(E_{1})=0.30 and P(E_{2})=0.70`



`P(frac{H}{E_{1}})=0.06 `


`P(frac{H}{E_{2}})=0.10`



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