Employees of a Gurugram office were asked how they reach work; the number outside the circles walks. How many employees use neither the metro nor the bus?

Neither metro nor bus = cab only + those outside all circles $=14+11=25$. 14 forgets the 11 who use none of the three, 33 is the whole Cab circle (part of it also uses the metro or bus), and 11 counts only the walkers.