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Ray Of Light [21]
3 years ago
15

A school requires an entrance exam score that is in the top 3% of the population in order to be accepted.

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
8 0
First, we assume the distribution is normal, since it is not given in the question.

Next, get a Z-table, such as 
stat.ufl.edu/~athienit/Tables/Ztable.pdf
and look through the table for 97% shaded.
The corresponding Z-value should be 1.88 SD (standard deviations) for 96.99%.
Now since
Z=(X-mean)/SD
where 
mean=500, SD=55
Solve for X.
____ [38]3 years ago
5 0
A. 485 is %3 of 500, but the deviation sets it slightly lower than that
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Answer:

36

20 percent * 180 =

(20:100)* 180 =

(20* 180):100 =

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Now we have: 20 percent of 180 = 36

Question: What is 20 percent of 180?

Percentage solution with steps:

Step 1: Our output value is 180.

Step 2: We represent the unknown value with $x$.

Step 3: From step 1 above,$180=100\%$.

Step 4: Similarly, $x=20\%$.

Step 5: This results in a pair of simple equations:

$180=100\%(1)$.

$x=20\%(2)$.

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

$\frac{180}{x}=\frac{100\%}{20\%}$

Step 7: Again, the reciprocal of both sides gives

Step-by-step explanation:

Hope it is helpful.....

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12:35

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