Question

A single card is drawn at random from a standard 52 card deck.

Work out in its simplest form:
P(10)
=

P(not 10)
=

Answer 1

There are four 10 cards in the deck, so P(10) = 4/52 = 1/13

P(not 10) = 1 - P(10). This is because the maximum probability is 1, and the card you draw will either be 10, or not a 10.

P(not 10) = 1 - 1/13 = 13/13 - 1/13 = 12/13