Parking Problems!

This week, I’m going back to the good ole engineering brainteaser.

This one is for all you who have to fight to find a parking spot at work!

The probability of finding the parking slot occupied is 1/3. You find it empty for 9 consecutive days. Find the probability that it will be empty on the 10th day.

Click Below See The Answer!

Sometimes, there is trick with probability questions; but more often, there is none. Always go for the logical answer to questions like this one. The answer to this is 2/3, because it says about the probability of finding it empty on the 10th day. In probability, if an event has already happened, it cannot have an effect on the probability of an event to occur in the future.

So the parking slot has been empty for 9 days but that does not affect the 10th day.

You can find this brainteaser and many others at

Can You Answer These Brain Teasers Like a Silicon Valley Engineer?