Question

if the relative frequency of getting a `blue` on spinner is 0.1, how many reds would you expect to get in 50 spins ?

Answer 1

All the relative frequencies add up to 1. So if relative frequency of getting a blue is 0.1, for red will be 1-0.1=0.9
0.1- blue
0.9- red
50- number of spins
0.9x50=45
I hope it's right c: