Decide What Values of the Variable Cannot Possibly Be Solutions $\frac { 247 } { 32 } \mathrm { hr }$

Decide what values of the variable cannot possibly be solutions for the equation.
-An experienced accountant can prepare a tax return in 13 hours. A novice accountant can do the job in 19 hours. How long will it take them to do the job working together?

A) $\frac { 247 } { 32 } \mathrm { hr }$

B) $\frac { 1 } { 247 } \mathrm { hr }$

C) $\frac { 1 } { 32 } \mathrm { hr }$

D) $\frac { 247 } { 6 } \mathrm { hr }$

Correct Answer:

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