Question

During an experiment, a spinner landed on green 9 times, which resulted in an experimental probability of StartFraction 1 over 6 EndFraction. Mary said that there must have been 45 trials in the experiment. Why is Mary incorrect?

Answer 1

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AnSwer:

=>If there were 45 trials, and you landed spinner on green 9 times,

The resulting probability would be 9/45 which reduces to 1/5 not 1/6.

=>However, if there were 54 trials, and if you land the spinner on green 9 times,

Then resulting probability would be 9/54 which reduces to 1/6.

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