The table below shows some numbers along with their probabilities of being selected: Numbers Probability Q Q Q 1 6 \frac{1}{6} 6 1 $2.5$ 1 3 \frac{1...
Question
The table below shows some numbers along with their probabilities of being selected:
| Numbers | Probability |
|---|---|
| $2.5$ | |
| $18.75$ |
If the average (expected value) of all these numbers is $7$, find the value of .