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230689 Questions
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Probability - Think About it
A box contains six cards. Three of the cards are black on both sides, one card is black on one side and red on the other, and two of the cards are red on both sides. You pick a card uniformly at random from the box and look at a random side. Given that
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TheMathCoder
Apr 26, 2018
+5
987
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+295
Complementary Probability
There is a machine with 8 toys in it that each cost between 25 cents and 2 dollars, with each toy being 25 cents more expensive than the next most expensive one. Each time Sam presses the big red button on the machine, the machine randomly selects one of
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TheMathCoder
Apr 26, 2018
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1612
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Help
Let $f$ be defined by \[f(x) = \left\{ \begin{array}{cl} 3-x & \text{ if } x \leq 3, \\ -x^3+2x^2+3x & \text{ if } x>3. \end{array} \right.\]Calculate $f^{-1}(0)+f^{-1}(6)$.
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Guest
Apr 26, 2018
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377
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A circle with radius r, is inside an equilateral triangle, with sides x cm
A circle with radius r, is inside an equilateral triangle, with sides x cm
The circumference of the circle touches each side of the triangle
The area of the circle is 100 cm^2
Work out the value of x
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Guest
Apr 26, 2018
+5
876
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+295
Counting with Restrictions
Suppose that . For example, . For how many distinct integers does have exactly three distinct elements?
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TheMathCoder
Apr 26, 2018
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800
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+295
Basic Probability with Combinations
We roll a fair 6-sided die 5 times. What is the probability that we get a 1 or a 2 in exactly 3 of the 5 rolls?
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TheMathCoder
Apr 26, 2018
-1
750
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+59
Two cards are drawn without replacement from a standard deck of 52 cards.
Two cards are drawn without replacement from a standard deck of 52 cards. What is the probability that one of the cards is red and the other is black, and are these events independent?
26/51; no, they are dependent events
13/51; no, they
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hayleeirene
Apr 26, 2018
-1
2607
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+59
Consider two events such that P(A) = , P(B) = , and P(A ∩ B) =
Consider two events such that P(A) = 1/4 , P(B) = 2/3 , and P(A ∩ B) = 1/5 . Are events A and B independent events?
Yes, they are independent because P(A) ⋅ P(B) = P(A ∩ B)
No, they are dependent because P(A) ⋅ P(B)
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hayleeirene
Apr 26, 2018
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886
1
if anyone can hlp me plz A cube-shaped gift is 11 centimeters long. What is the least amount of wrapping paper you need to wrap the gift?
if anyone can hlp me plz
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Guest
Apr 26, 2018
-1
1454
1
+59
At an amusement park, the probability that a child eats a hot dog and drinks
At an amusement park, the probability that a child eats a hot dog and drinks a soda pop is 0.38. The probability that a child eats a hot dog is 0.61, and the probability that a child drinks soda pop is 0.89. What is the probability (rounded to the nearest
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hayleeirene
Apr 26, 2018
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340
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Anyone I need some help with this problem.
Consider two events such that P(A) =3/5, P(B) =4/7, and P(A ∩ B) = 12/35. Are events A and B independent events?
A:Yes, they are independent because P(A) ⋅ P(B) = P(A ∩ B)
B:No, they are dependent because P(A)
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Guest
Apr 26, 2018
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486
0
I am little stuck.
On any particular Saturday evening, the probability that Jenna will go to the movies and go for coffee is 1/4,The probability that she will go for a coffee 5/7, given that she has gone to the movies, is . What is the probability that Jenna will go
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Guest
Apr 26, 2018
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364
0
I am lost can anyone help me,please? :)
A two-way frequency table is shown below that displays the relationship between television technology type and television size sold at a local retail outlet. Store managers took a sample of 90 people and recorded the following results:
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Guest
Apr 26, 2018
0
2639
2
+845
x^2 - 9y^2 = 0 where x > 0 and y > 0
x^2 - 9y^2 = 0 where x > 0 and y > 0
work out the ratio of x : y
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YEEEEEET
Apr 26, 2018
+1
733
1
+2448
Please help, ty!!
Please help, ty!!
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RainbowPanda
Apr 26, 2018
+1
890
2
+2448
Help please <3
Help please <3
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RainbowPanda
Apr 26, 2018
0
978
2
+2448
Please help asap
Please help asap
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RainbowPanda
Apr 26, 2018
0
903
0
Help ASAP.
Mr. Rodriguez asked 60 randomly chosen students from each grade level at Willowbrook School about their favorite types of reading materials. Of those 60 students, 12 chose science fiction. Mr. Rodriguez used the data to draw the inference that about 20%
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Guest
Apr 26, 2018
+1
679
1
+196
image is question
help
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sangangsx
Apr 26, 2018
0
911
1
+196
image is question hellpp meee
help
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sangangsx
Apr 26, 2018
0
1060
1
+1833
Logarithm question for algebra 2
Logarithm question for algebra 2
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Mellie
Apr 26, 2018
+1
2777
1
Help
1. The graph of the equation $y = \frac{x}{x^3 + Ax^2 + Bx + C}$, where $A,B,C$ are integers, is shown below. Find $A + B + C$.
2. \[f(x)
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Guest
Apr 26, 2018
0
750
2
+2448
Please help, ty!
Please help, ty!
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RainbowPanda
Apr 26, 2018
0
425
1
I need serious help with this anyone
A researcher wishes to use an observational study to determine the proportion of drivers who approach an intersection while wearing their seat belt, depending on how many passengers are in the car. The researcher stays hidden, using cameras and sensors,
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Guest
Apr 26, 2018
0
561
1
Anyone can help
A scientist has a hypothesis that as the number of police cars is increased on a roadway, the proportion of cars speeding decreases. He finds that at police car level X1 (one police car per 100 miles), the proportion of cars speeding is p=0.83 .
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Guest
Apr 26, 2018
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