<PRE><B>Question 492014</B>
To get a C in history, Nandan must average 74 on four tests.
Scores on the first three tests were 69, 75, and 60.
 What is the lowest score that Nandan can get on the last test and still receive a C?
:
Let x = the lowest he can get on the 4th test and have a 74 average
:
{{{(69+75+60+x)/4}}} = 74
{{{(204+x)/4}}} = 74
Multiply both sides by 4
204 + x = 4(74)
204 + x = 296
x = 296 - 204
x = 92 is the grade he needs
:
:
Check this
{{{(69+75+60+92)/4}}} = 74
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