11 12 c 16 18 if the mean is 12, which number could c be?
1 answer:
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Answer: 0.8413
Step-by-step explanation:
Given : Henry has collected data to find that the typing speeds for the students in a typing class has a normal distribution.
Mean :
Standard deviation :
Let x be the random variable that represents the typing speeds for the students.
The z-score :-
For x= 51
Using the standard normal distribution table ,the probability that a randomly selected student has a typing speed of less than 51 words per minute :-
Hence, the probability that a randomly selected student has a typing speed of less than 51 words per minute = 0.8413
The Solution for the given system of equations is (-2) and .
The given are linear equations as follow:
y = + 3 .. ... ...(1)
and x = -2. .. .... ...(2)
We already know the first part of the solution (x) which is -2. We can find the other part (y) by putting the value of equation (2) in equation (1).
By putting the values of x in equation (1), we get
y = + 3
y = + 3
Taking the L. C. M of denominators which will be '3', we get:
y =
y =
So the second part (y) of the solution of the given equation is .
Hence, the overall solution to the given system of equation is .
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