Question 86026
If you consider her first 3 tests, you can write the following equation, where x,y, and z are her test scores:
{{{(x+y+z)/3=92.5}}}
Equation #1: {{{(x+y+z)=277.5}}}
Now, after she takes her 4th test to achieve the 94 average, (call that score 'w'), you can write:
Equation #2: {{{(w+x+y+z)/4=94}}}
Now, substitute the value of (x+y+z) from Equation #1 into Equation #2:
{{{(w+277.5)/4=94}}}
And solve for w...
{{{w+277.5=376}}}
{{{highlight(w=98.5)}}}
Good Luck,
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