Question

Robotics manufacturers can design mobility features in one of several ways. Robots can have legs, wheels, both legs and wheels, or no legs or wheels. Using a random sample of 106 robots, researchers found that 63 had legs only, 20 had wheels only, 8 had both legs and wheels, and 15 had no legs or wheels. What's the relative frequency of robots with both legs and wheels? 

Answer 1

Total robots = 106

Number of robots with both legs and wheels = 8

$\text{Relative frequency} = \frac{8}{106} \times 100 = 7.55$

Relative frequency is 7.55%.