Answer:
Step-by-step explanation:
If you have answer choices that would be helpful.
If not I would assume that it means that giving every student the same test is an example of a controlled variable.
Around 8$ back. The exact amount would be 7.60$
The expected value of the game is the mean value of the game
The expected value of the game is $1
<h3>How to determine the expected value?</h3>
There are 13 spades in a deck of card of 52
So, the probability of selecting a spade is:
P(Spade) = 13/52
Simplify
P(Spade) = 1/4
Winning = $7
The probability of not selecting a spade is:
P(Not spade) = 1 - 1/4
Simplify
P(Not spade) = 3/4
Lose = $1
The expected value of the game is:

This gives

Simplify

Evaluate

Hence, the expected value of the game is $1
Read more about expected values at:
brainly.com/question/15858152
Answer:
16 (positive 16)
Step-by-step explanation:
Postive is because the first change is positive and the school bell is out sorry