A Professional Painter Can Paint a Kitchen in 10 Hours $7 \frac { 23 } { 25 }$

Multiple Choice

A professional painter can paint a kitchen in 10 hours. His apprentice can paint the same kitchen in 14 hours. If they worked together, how long would it take for them to paint the kitchen?

A) 12
B) $7 \frac { 23 } { 25 }$
C) $15 \frac { 21 } { 25 }$
D) 4
E) $5 \frac { 5 } { 6 }$