stem/leaf & circle graph

The results of a class survey about students' favorite sports are shown. Which sports could be combined to make up 50% of the graph? 

• Soccer, Gymnastics
• Soccer, Baseball
• Basketball, Baseball
• Track, Basketball

While doing a project for P. E. class, Ling researched the number of athletes competing in an international sporting event.

How many countries have exactly 32 athletes?

• 4

• 3

• 6

• 1

The employee at the department store counted the number of ties on each tie rack.

How many racks have at least 30 ties but fewer than 40 ties?

• 4

• 2

• 7

• 5