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kondor19780726 [428]
2 years ago
11

Due to symmetry, the probability that the standard normal random variable Z is less than 0 is equal to ______. Multiple choice q

uestion. 0
Mathematics
1 answer:
Butoxors [25]2 years ago
8 0

Answer:

.5

Step-by-step explanation:

The probability that a normal random variable is less than its mean is .5

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In a class of p students, the average (arithmetic mean) of the test scores is 70. in another class of n students, the average of
lys-0071 [83]

First case:

average of test score =70

number of students =p

total score of 'p' students = ( average of test score)*( number of students)

total score of 'p' students =70p

Second case:

average of test score =92

number of students =n

total score of 'n' students = ( average of test score)*( number of students)

total score of 'n' students =92n

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so, total score =86(p+n)

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now, we can find p/n

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5 0
3 years ago
8x = 7x + 3<br><br> Would I combine the 8x and the 7x at all in this equation?
Kryger [21]
Yes...thats what u want to do. you want to get the x terms on one side and everything else on the other side.

8x = 7x + 3....so we will subtract 7x from both sides
8x - 7x = 7x - 7x + 3....simplify
1x, or just x = 3 (because ur 7x's cancelled each other out)

so ur answer is : x = 3

and u can check ur answer by subbing it back into the original equation.
8x = 7x + 3
8(3) = 7(3) + 3
24 = 21 + 3
24 = 24 (correct)
3 0
3 years ago
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fgiga [73]
Assuming the sum of the  opposite angle would be 180. We can easily calculate for x and ultimately solve for the angle of B. We do as follows

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x = 48 degrees

Therefore angle B would have a measurement of 132 degrees. Hope this helps.
3 0
3 years ago
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Math question help pls
Mkey [24]

Answer:

the first one or 4n + 30 = 6n + 25

Step-by-step explanation:

7 0
3 years ago
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