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Schach [20]
3 years ago
10

The scores on a standardized test are normally distributed with the mean of 750 and standard deviation 70. Find the probability

that a score is between 750 and 890.
2.28%


47.7%


50%


13.6%
Mathematics
2 answers:
mafiozo [28]3 years ago
3 0
Hey the answer is C.47.7 
goodluck!
UNO [17]3 years ago
3 0
Konichiwa! Len here
The answer is C.47.7  im vary sorry if the answer is incorrect! hope this helped!
Have a nice day 
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\bold{r+\frac{3Q}h=t}\\-r\qquad\ -r\\\bold{\frac{3Q}h=t-r}\\\cdot h\qquad \cdot h\\ \bold{3Q=(t-r)h}\\^{\div(t-r)\quad\div(t-r)}\\\bold{\dfrac{3Q}{t-r}=h}

Or, if you mean (r+3Q)/h=t:

\bold{\frac{r+3Q}h=t}\\{}\ \ \cdot h\quad\ \cdot h\\\bold{r+3Q=ht}\\{}\ \ \div t\qquad \div t\\\bold{\dfrac{r+3Q}{t}=h}\\\\\bold{h=\dfrac{r+3Q}{t}}

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