Eh, here's my best try for a table:
<u>Like tv</u> <u> don't like tv</u> <u>total</u>
<u>Like reading:</u> 70 10 80
<u>Don't like read</u>. <u>20</u> <u>30</u> <u>50 </u>
<u>total </u> 90 40 130
The percentage of students that like tv as well as reading is- 70 divided by 130 which gives you .538 which in percentage is 53.8%.
The probability of a student that does not prefer to watch tv as also does not like to spend their time reading is 30 over 40 which can be simplified or reduced to 3 over 4. [30/40 reduced to 3/4]
Hope this somehow helped you :)
To calculate expected value,
We can add up the probability of all possible events.
The 2 possible events are either winning $50 or losing the prize, which is $ - 50
Expected value =
50 x 40 % + (-50) x 60%
= $-10
So the answer is $-10
Answer:
Step-by-step explanation:
The graph is needed to answer this question.
Mean: total number of participants (9) divided by total distance (unknown because the graph is not provided)
Answer:
3.4=3.4
Step-by-step explanation:
Answer:
The evaluated answer to this equation is 19.
Step-by-step explanation:
<em>2r² + 3s³ - r² + 4t² - r²</em>
In the problem, we are given values for the variables in the equation.
<em>r = -2</em>
<em>s = -3</em>
<em>t = 5</em>
Let's plug these numbers into the equation.
<em>2(-2)² + 3(-3)³ - (-2)² + 4(5)² - (-2)²</em>
First, simplify the exponents.
<em>2(4) + 3(-27) - (4) + 4(25) - (4)</em>
Next, multiply the numbers starting from left to right.
<em>8 + (-81) - 4 + 100 - 4</em>
Add 8 and -81 together.
<em>-73 - 4 + 100 - 4</em>
Subtract 4 from -73.
<em>-77 + 100 - 4</em>
Add -77 to 100.
<em>23 - 4</em>
Subtract 4 from 23.
<em>19 </em>
<u>So, your final simplified answer to this equation is 19.</u>
