A) Taken at a basketball championship, the sample must be considered to be biased—probably in favor of basketball. Any conclusion can only be applied to attendees polled at the championship.
b) If a conclusion is to be drawn about opinions of students at the school, then a method needs to be devised to obtain opinions from a random sample of students. Likely, care would need to be taken to ensure expressed opinions are not influenced by games scheduled or just concluded, or by other factors such as reported injuries. A random sample from a list of student ID numbers might be appropriate. The poll might need to be conducted between seasons.
<u>Given</u><u> </u><u>:</u><u>-</u><u> </u> 
<u>To</u><u> </u><u>Find </u><u>:</u><u>-</u><u> </u> 
<u>Answer</u><u> </u><u>:</u><u>-</u><u> </u> Its given that cost of 10 apples is $6.50 .
So, by Unitary method , we can solve this ,
→ Cost of 10 apples is $ 6.50.
→ Cost of 1 apple will be
=
<u>Hence</u><u> the</u><u> required</u><u> answer</u><u> </u><u>is</u><u> </u><u>$</u><u>0</u><u>.</u><u>6</u><u>5</u><u>.</u>
86/139*100%= 61.87%
The final answer is 61.87%~
Expected value is $20.20
Step-by-step explanation:
Here, we want to calculate the expected value
What we have to do here is to multiply the probability by the payout value; after which we add all values
Thus, we have the payout value as;
1(0.12) + 4(0.2) +6(0.38) + 8(0.2) + 10(0.1)
= 0.12 + 0.8 + 2.28 + 1.6 + 1
If A and B are independent, then
.
a.



b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:



c. DeMorgan's law can be used here too:


