bigmouth804
20.07.2019 •
Mathematics
Acard is drawn randomly from a standard deck of cards. you win $10 if the card is a spade or an ace. what is the probability that you will win the game?
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Ответ:
These two events are not mutually exclusive; this means they can happen at the same time. For two events that are not mutually exclusive,
P(A or B) = P(A) + P(B) - P(A and B)
This gives us
P(spades or Ace) = P(spades) + P(Ace) - P(spades and Ace)
There are 13 spades out of 52 cards.
There are 4 aces out of 52 cards.
There is 1 card that is a spade and an ace out of 52 cards.
13/52 + 4/52 - 1/52 = 16/52 = 4/13
Ответ:
The formula for the perimeter (P) of a square with side length (s) is
P = 4s
We know P = 120
120 = 4s
Divide both sides by 4
30 = s
Flip
s = 30
That's your answer. Have an awesome day! :)