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

Answer:

Mary is incorrect

Step-by-step explanation:

We are given the following in the question:

Number of times the spinner landed on green color = 9

P(Green) =

$\dfrac{1}{6}$

Mary claimed that there must be 45 trials.

$\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}$

P(Green) =

$\dfrac{\text{Number of times spinner landed on green}}{\text{Total number of trials}}\\\\\Rightarrow \dfrac{9}{x}=\dfrac{1}{6}\\\\\Rightarrow x = 9\times 6 = 54$

There are 54 trials in the experiment and not 45 trials. Thus, Mary is incorrect.

Answer 2

Answer:

A

Step-by-step explanation:

I got it correct on the test