Solve the following appropriately

An insurance company covers claims from four different non-life portfolios, denoted as G1, G,, G; and G4. The number of policies included in each portfolio is given below: Portfolio G1 G3 No. of policies 4,000 7,000 13,000 6,000 It is estimated that the percentages of policies that will result in a claim in the following year in each of the portfolios are 8%, 5%, 2% and 4% respectively. Suppose a policy is chosen at random from the group of 30,000 policies comprising the four portfolios after one year and it is found that a claim did arise on this policy during the year. Calculate the probability that the selected policy comes from portfolio G3- [3] Consider two random variables X and Y with joint probability density function (pdf) f(. 1= =(1-m), 0