Question 222722
Jim's average score on three tests is 82. 
What is the least he can score on his fourth test so that his average will be at least 86?
:
Let x = the score on the 4th test
:
{{{((3*82)+x)/4}}} = 86
:
{{{(246+x)/4}}} = 86
Multiply both sides by 4
246 + x = 4(86)
:
246 + x = 344
:
x = 344 - 246
:
x = 98 for his average to be 86
:
:
Check on calc (3(82)+98)/4 = 86