exam Maths Puzzle Numerical Ability

solve for a: p=a+b+c

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exam Other Question

JIM HAS GOTTEN SCORES OF 60 AND 97 ON HIS FIRST TWO TESTS. WHAT SCORE MUST HE GET ON HIS THIRD TEST TO KEEP AN AVERAGE OF 75 OR GRATER ? Tutor: Can you check this problem to see if I got it right?????Thank you!!!!
Simplify the problem
(1/2)^3+(1/3)-2-(1/4)-2

Answer
0.125+(1/3)(-2)-(1/4)(-2)
0.125+9-(1/4)(-2)
0.125+9-16
-6.875