What is the probability of an ace or space or both the dew of cards , the answer options are 1/13 , 2/13 , 3/13 , 4/13 , please tell me the right option

The probability of an ace or a spade.



The probability of an ace is 4/52.

The probability of a spade is 13/52

But, we have to subtract off the ace of spades else we double count it.

4/52+13/52-1/52