Question

Elibri has a spinner like the one that follow, where 3/5 of the spinner is red, 1/5 is blue and 1/5 is yellow.

elibri earns 15 points every time she spins a blue of yellow space, and she earns 5 points every time she spins a red space.

what is the expected value of a single spin?

PLEASE HELP AND THANK YOU

Answer 1

The expected value is the sum of values multiplied by their probabilities.

... 15×(1/5+1/5) + 5×(3/5) = 6+3 = 9

The expected value of a single spin is 9 points.