You are dealt one card from a 52-card deck. Find the probability that you are not dealt a card with number from 4 to 9

The probability is

Oh! Card math! Fun!

Okay, so out of a 52-card deck of cards, we have 4 fours, 4 fives, 4 sixes, 4 sevens, 4 eights, and 4 nines. Together that is 24 cards. As stated in the problem, there are 52 cards in all. 52 - 24 = 28. This means that you have 28 cards that are not from 4 to 9. So your probability is 28/52 or 7/13.

5/12 to #/52. So 21/52.