Suppose that the joint density function of the random variables X and Y is      f(x,y)=k(1+2y), if 1

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Suppose that the joint density function of the random variables X and Y is

     f(x,y)=k(1+2y), if 1<x<13 and 0<y<1, and

     f(x,y)=0, otherwise.

Show that the marginal distribution of X is

     g(x)=c, if  1<x<13, and

     g(x)=0 otherwise.

Enter the value of c.

Hint: Of course, first, you need to find the value of k.

Round your answer to a number with two decimal digits after the decimal point. For example if your answer is 1/40, which is equal to 0.025, then you should enter 0.03.

(Do NOT use decimal comma; 0,03 would be wrong.)

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