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SAT Math 1.3 Statistics and Probability. Approximately what is the probability that they will be placed in alphabetical order?
SAT Math 1.4 Statistics and Probability. If two standard 6-sided dice are rolled, what is the probability that the sum of the dice will be gre...
SAT Math 1.5 Statistics and Probability. If Silas draws one card, then places it in his pocket and draws another, what is the probability that...
ACT Math 3.2 Pre-Algebra 436 Views
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Description:
ACT Math: Pre-Algebra Drill 3, Problem 2. What is the probability that a red queen will be drawn?
- Pre-Algebra / Simple probability
- Product Type / ACT Math
- Foreign Language / Spanish Subtitled
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Chinese Subtitled
- Statistics and Probability / Compute probabilities of compound events
- Statistics and Probability / Use rules of probability to compute probabilities of compound events
- Pre-Algebra / Elementary counting technique and simple probability
Transcript
- 00:03
Here's your shmoop du jour: A card is drawn at random from a 52 card deck.
- 00:08
What is the probability of drawing both a red card and a queen?
- 00:13
For this problem, let's assume Criss Angel is at least 500 yards away.
- 00:17
Here are the potential answers...
- 00:22
Ooh, a card problem. Vegas, baby!
Full Transcript
- 00:25
So... even if we haven't lost our shirt at the blackjack tables...
- 00:28
...hopefully we're at least familiar with a card deck...
- 00:31
It has 52 cards, with 13 cards in each of 4 suits -- the red suits are diamonds and
- 00:37
hearts; the black suits are clubs and spades.
- 00:41
So ONE card is drawn and they are asking for a RED QUEEN.
- 00:45
Uh... no -- these queens.
- 00:48
Well, there are only 2 cards that are both red AND a queen --
- 00:52
-- the queen of hearts and the queen of diamonds.
- 00:55
So the odds of pulling EITHER of those cards is a 2 out of 52 chance
- 01:00
or, if we reduce the fraction...
- 01:01
...1 out of 26
- 01:03
The answer is E.
- 01:04
As in, "Easy money."
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