Is a round 10 inch and a round 7 inch cake enough for 35 people?
It's white cake with raspberrie and ganache filling.

Here's a good reference.

This is the "party" serving amounts.
http://www.wilton.com/cakes/making-cakes/baking-party-cake-2-inch-pans.cfm

this is the "wedding" serving amounts
http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm

Yes.

The 10" alone serves 38.
The 7" serves 19.