How many crew members are aboard the yacht?

This depends on the size of the yacht. Generally;

4 cabin yachts have 2 crew members, or more depending on the standard of gulet.
6 – 7 cabin yachts have 3 – 6, sometimes 7 crew members,
more than 8 cabin yachts, will have 4 to 6, or up to 8 crew members on board.
But in High or Ultra Deluxe and VIP yachts, there is generally more crew on board and less cabin count.