Find the number, if the sum of 9 and a half a number equals 35. Which of the following translations is correct?
2 answers:
Answer: The required number is 52 and the correct option is
(A)
Step-by-step explanation: Given that the sum of 9 and half a number equals 35.
We are to find the number and also to select the correct translation.
Let x represents the required number.
Then, according to the given information, the equation can be written as :
The solution of equation (i) is as follows :
Thus, the required number is 52 and the correct translation is
Option (A) is CORRECT.
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Answer:
So then the best answer for this case would be:
C. 2.78
Step-by-step explanation:
For this case we have the following probabability distribution function given:
Score P(X)
A= 4.0 0.2
B= 3.0 0.5
C= 2.0 0.2
D= 1.0 0.08
F= 0.0 0.02
______________
Total 1.00
The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.
If we use the definition of expected value given by:
And if we replace the values that we have we got:
So then the best answer for this case would be:
C. 2.78