Answer:
Loss of $1.20
Step-by-step explanation:
The possible outcomes for this lottery and their probabilities are:
- a 1 in 100 chance of winning $450
- a 2 in 100 chance of winning $120
- a 4 in 100 chance of winning $30
- a 93 in 100 chance of losing $10
Therefore, the expected value of this lottery when buying one ticket is:
![E(X) = \frac{1}{100}*\$450+ \frac{2}{100}*\$120+ \frac{4}{100}*\$30-\frac{93}{100}*\$10 \\E(X) = -\$1.2](https://tex.z-dn.net/?f=E%28X%29%20%3D%20%5Cfrac%7B1%7D%7B100%7D%2A%5C%24450%2B%20%5Cfrac%7B2%7D%7B100%7D%2A%5C%24120%2B%20%5Cfrac%7B4%7D%7B100%7D%2A%5C%2430-%5Cfrac%7B93%7D%7B100%7D%2A%5C%2410%20%5C%5CE%28X%29%20%3D%20-%5C%241.2)
Therefore, you are expected to lose $1.2 per ticket.
Divide 25 by 4 and you get 6 with a remainder of 1. That remainder of 1 can go over 4 to create the final answer of 6 and 1/4.
Follow pemdas. Evaluate operations in parentheses first.
2*(-7)+14-4
Then multiply
-14+14-4
Then add and subtract from left to right
-14+14=0
0-4=-4
Final answer: -4
Answer:
2.25 inches
Step-by-step explanation:
The mean, or the average, or the rainfall amounts, can be found by adding all of the amounts together and dividing by the number of amounts. In this case,
. Hope this helps!
I have done this question before but i can’t remember