EGR 1400 FINAL || 102 QUESTIONS AND ANSWERS
(GRADED A+)
40 ohms - ANSWER-Two resistors R1 and R2 are in parallel. If R1 = R2 = 80 ohms, what is the equivalent
resistance if these two resistors were combined into one?
10 - ANSWER-In the circuit below, the resistance Rab is equal to___?
circuit har a 6 ohm resistor in series with an 8 ohm resistor that is parallel to another 8 ohm resistor
5.1 - ANSWER-A Detroit Lions football player kicks a football at an angle of 30º and a velocity of 20 meters per
second. How high will the ball go (in meters from the ground)?
14.5, window - ANSWER-In a desperate attempt to get Juliet's attention, Romeo (who is 6 foot tall) throws a rock
from 1 foot above his head at an angle of 45º with a velocity of 22 meters per second. Assuming that the rock
hits the center of the window when it has reached it's highest point, how high is the window (the center of the
window, in meters)?
If Juliet, who just caught a glimpse of Romeo picking up the rock, excitedly ran to the window and opened it 2
seconds after Romeo threw the rock, would the rock hit the window or Juliet?
13.04% - ANSWER-(Poisson distribution) Depending on the color of car you purchase, you may be at a higher
risk for getting a speeding ticket. For Porsche's, a black car typically gets 1.4 speeding tickets, a white car
typically gets 1.2 speeding tickets, and a red car typically gets 3.2 speeding tickets over a year period. If you
purchased a red Porsche, what's the probability of getting exactly one speeding ticket?
,d - ANSWER-A company that makes toy Elmo dolls has a chief inspector named Vrisken. In three hours, an
average of 2 (two) crates of dolls are rejected because they contain more than 4 randomly inspected faulty dolls
(bad smell, discolored, doesn't speak, swears, etc...). What is the probability of less than 2 crates of Elmo dolls
being rejected in a three-hour period? (Assume that this plant operates 24 hours per day, 7 days per week).
a.
1.83 %
b.
27.07 %
c.
16.48 %
d.
None of these
e.
13.53 %
6/36 - ANSWER-What is the probability of rolling a total of 7 (seven) on a pair of standard dice?
27.78% - ANSWER-What is the probability of rolling a total of 5 (five) on a pair of dice with these sides:
(1, 1, 2, 3, 4, 4)?
95% - ANSWER-What percentage of candidates have an age between 21 and 29 years from a group of people
with normally distributed ages with an average age of 25 years old and a standard deviation of 2 years?
b - ANSWER-Calculate the standard deviation for the data set: 1, 2, 2, 4, 7
a.
4.77
b.
None of these
, c.
2.81
d.
3.20
e.
2.39
a - ANSWER-In C#, you can simulate rolling two dice by selecting a random number between 1 and 6 to
represent each die roll and then adding them together to get the dice total. Let's say that we developed a
program to do this and we rolled the pair of dice 50 times and recorded the results of each roll on a sheet of
paper. Instead of using two die separately and totaling them (which would result in a total between 2 and 12),
can we just select one random number between 2 and 12 and achieve the same experimental results for the 50
rolls as rolling two die and adding them?
a.
No, it's not possible to get the same experimental results with one random number
b.
Yes, using the same scaling as before
c.
Yes, if the Visual C# code is written to scale the single random number between 2 and 12
d.
Yes, if the random number is selected using myRand.Next(2,13);
&& - ANSWER-This operator logically joins two expressions into one. All the expressions must be true for the
overall expression to be true.
|| - ANSWER-This operator logically joins two expressions into one. At least one of the expressions must be true
for the overall expression to be true.
(GRADED A+)
40 ohms - ANSWER-Two resistors R1 and R2 are in parallel. If R1 = R2 = 80 ohms, what is the equivalent
resistance if these two resistors were combined into one?
10 - ANSWER-In the circuit below, the resistance Rab is equal to___?
circuit har a 6 ohm resistor in series with an 8 ohm resistor that is parallel to another 8 ohm resistor
5.1 - ANSWER-A Detroit Lions football player kicks a football at an angle of 30º and a velocity of 20 meters per
second. How high will the ball go (in meters from the ground)?
14.5, window - ANSWER-In a desperate attempt to get Juliet's attention, Romeo (who is 6 foot tall) throws a rock
from 1 foot above his head at an angle of 45º with a velocity of 22 meters per second. Assuming that the rock
hits the center of the window when it has reached it's highest point, how high is the window (the center of the
window, in meters)?
If Juliet, who just caught a glimpse of Romeo picking up the rock, excitedly ran to the window and opened it 2
seconds after Romeo threw the rock, would the rock hit the window or Juliet?
13.04% - ANSWER-(Poisson distribution) Depending on the color of car you purchase, you may be at a higher
risk for getting a speeding ticket. For Porsche's, a black car typically gets 1.4 speeding tickets, a white car
typically gets 1.2 speeding tickets, and a red car typically gets 3.2 speeding tickets over a year period. If you
purchased a red Porsche, what's the probability of getting exactly one speeding ticket?
,d - ANSWER-A company that makes toy Elmo dolls has a chief inspector named Vrisken. In three hours, an
average of 2 (two) crates of dolls are rejected because they contain more than 4 randomly inspected faulty dolls
(bad smell, discolored, doesn't speak, swears, etc...). What is the probability of less than 2 crates of Elmo dolls
being rejected in a three-hour period? (Assume that this plant operates 24 hours per day, 7 days per week).
a.
1.83 %
b.
27.07 %
c.
16.48 %
d.
None of these
e.
13.53 %
6/36 - ANSWER-What is the probability of rolling a total of 7 (seven) on a pair of standard dice?
27.78% - ANSWER-What is the probability of rolling a total of 5 (five) on a pair of dice with these sides:
(1, 1, 2, 3, 4, 4)?
95% - ANSWER-What percentage of candidates have an age between 21 and 29 years from a group of people
with normally distributed ages with an average age of 25 years old and a standard deviation of 2 years?
b - ANSWER-Calculate the standard deviation for the data set: 1, 2, 2, 4, 7
a.
4.77
b.
None of these
, c.
2.81
d.
3.20
e.
2.39
a - ANSWER-In C#, you can simulate rolling two dice by selecting a random number between 1 and 6 to
represent each die roll and then adding them together to get the dice total. Let's say that we developed a
program to do this and we rolled the pair of dice 50 times and recorded the results of each roll on a sheet of
paper. Instead of using two die separately and totaling them (which would result in a total between 2 and 12),
can we just select one random number between 2 and 12 and achieve the same experimental results for the 50
rolls as rolling two die and adding them?
a.
No, it's not possible to get the same experimental results with one random number
b.
Yes, using the same scaling as before
c.
Yes, if the Visual C# code is written to scale the single random number between 2 and 12
d.
Yes, if the random number is selected using myRand.Next(2,13);
&& - ANSWER-This operator logically joins two expressions into one. All the expressions must be true for the
overall expression to be true.
|| - ANSWER-This operator logically joins two expressions into one. At least one of the expressions must be true
for the overall expression to be true.
