Study the following diagram and answer questions based on it.
The diagram represents the likes of kids of a class.

Q:

The ratio of kids who like only Mars to those who like all the three is

• 1
  $$ {7\over 5}$$
• 2
  $$ {7\over 8}$$
• 3
  $$ {7\over 6}$$
• 4
  $$ {14\over 13}$$