joint pdf-calculating probability

Pair of random variables having joint pdf f (x, y); x> 0; y> o.
How to calculate p (x <1 & y <1)
Thanks

 

Wont you want to do double integration from 0 to 1 for both variables??

 

This is the sub question followed by the question to calculate the marginal probability of x & y. I think, the solution is to sum up the integrals of marginal pdf of x & y over the limits x <1; y <1.
Is it the correct method?

Thanks

 

I don't have the exact question.

For computing joint probability, I agree you need double integration.