Answer:
160:340
Step-by-step explanation:
The hours between 2:00pm and 4:00pm is 2 hours. If originally 350 freshman and 200 sophomores are at the carnival, and 20 freshman leave every hour, we can determine how many freshman left in 2 hours:
and if 35 sophomores arrive every half our, we know that for every two hours there is 4 half hours, therefore:
The amount of freshman at 4:00pm:
and the amount of sophomores:
the ratio is 160:340
Answer:
0.25
Step-by-step explanation:
40% of the students use mac computer
67% of the students are undergraduate
23% of the students are graduates and use mainly PC
Students that use PC computers = 100 -40 = 60%
Students that are graduates = 100 - 67 = 33%
Students that are graduates that use Mac = 33 - 23= 10%
Students that are undergraduate that use PC = 67 - 30 = 37%
Using conditional probability
Pr(B|A) = Pr(A and B) / Pr(A)
Pr(Graduate | mac) = Pr(graduate and mac) / Pr(mac)
= 10%/ 40%
= 1/4
= 0.25
2(l + b) = 27.2
2(l + 7.9)= 27.2
2l + 15.8 = 27.2
2l = 11.4
l = 5.7 ft
Answer:
0.67449
Step-by-step explanation:
Let be the 3rd quartile of normal distribution .
-z-score corresponding to the upper quartile can be calculated in excel as:
- In Excel, click on any empty cell'
- Type the function NORMINV
- Enter the probability as 0.75, mean= 0 and standard deviation=1
- Click the enter button.
-The output is 0.67449. Hence, the z-score corresponding to the upper quartile (Q3) of a normal distribution is 0.67499