Question 1195691
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There are 13 spades and 4 cards labeled "10"
There appears to be 13+4 = 17 such cards combined. 
But we must subtract off the 1 card that's a ten of spades, since it was double-counted when adding 13 to 4.


We really have 13+4-1 = 16 cards that are either a spade, a ten, or both.
Put another way: we have 13 spades, then 3 other cards (10 of clubs, diamonds and hearts) to get 16 such cards total.


Divide this value over 52 and reduce
16/52 = (4*4)/(4*13) = <font color=red>4/13</font>
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