Answer:
a) Binomial distribution.
b) Expected value = 32
c) Variance = 16
Standard deviation = 4
d) Getting a score of over 50 is not likely.
Step-by-step explanation:
Probability of getting a question right = (1/2) = 0.5
Probabilty of NOT getting a question right = 1 - 0.5 = 0.5
a) This kind of probability distribution approximates the binomial distribution the most. To solve for the probability of getting any number of questions correctly, the binomial distribution formula would give the required answer.
b) Expected score = mean = np = 64×0.5 = 32
c) Variance = np(1 - p) = 64 × 0.5 × 0.5 = 16
Standard deviation = √(variance) = √16 = 4
d) The mean score = 32.
Standard deviation = 4.
To score over 50, is at least 2 standard deviations away. And it is known that about 95% of the distribution lies between -2 and +2 standard deviations from the mean.
So, a score of over 50 is really not very likely.
Hope this Helps!!!
Answer:
B (2,8)
Step-by-step explanation:
Similar TriangleThe small triangle and the large triangle are similar triangles. They have the same proportion in the corresponding side. We could solve h by making a comparison of base-hypotenuse.
In this case, we could write it as:
Input the numbers into the formula aboveSimplify the fraction
Do cross multiplication
14 × h = 350 × 1
14h = 350
h = 350/14
h = 25
The value of h is 25
Well,
35 - 15 = 20
43 - 26 = 17
The difference is that there 3 apart ( I just subtracted 20 with 17 and got 3)
Hope This Helps!!!
:)
Answer:
7200g, because if you multiply the mass value by 1000