A fair spinner has 5 equal sections, 2 of them red. The spinner is spun 100 times. About how many times would you expect it to land on red? Enter the number of red landings.

Explicación

Red covers 2 of the 5 equal sections, so it is expected on two fifths of the spins, and two fifths of 100 is 40. Using one fifth instead gives 20, which would be the right figure only if a single section were red, while here two separate sections produce the colour.