Video: Using Experimental Probability to Determine the Expected Number of Outcomes of an Event

A fair spinner has 8 equal sections, one of which is green. If the spinner is spun 56 times, what is the expected number of times it will stop on the green section?

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Video Transcript

A fair spinner has eight equal sections, one of which is green. If the spinner is spun 56 times, what is the expected number of times it will stop on the green section?

We’re told that the spinner has eight equal sections as shown. One of the sections is green. This means that the probability of landing on the green section is one-eighth or one out of eight. The spinner is spun 56 times. This means that the expected number of times it will stop on the green section is one-eighth of 56. One-eighth of 56 or one-eighth multiplied by 56 is equal to seven, as there are seven-eighths in 56. If the spinner is spun 56 times, we would expect it to stop on the green section seven times.

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