Question 1037228

Where do I start!?
A standard deck of cards contains 52 cards. One card is selected from the deck.
Heart or diamond =
Nine or diamond =
Heart or diamond or spade=
<pre>How about here!!
P(Heart or Diamond) = P(Heart) + P(Diamond) - P(Heart and Diamond) 
<pre>P(Heart or Diamond) = {{{highlight_green(13/52 + 13/52 - 0 = 26/52 = 1/2)}}}