In: Statistics and Probability
Suppose you have a deck of 40 cards, containing 10 red cards and 30 black cards. A player draws 7 cards from the deck and places them into their hand. The remaining deck of 33 cards has 5 red cards and 5 black cards in the top 10 cards. The other 23 cards in the remaining deck are unknown color. What is the probability of the player's hand having 0,1,2,3,4,5 red cards?
Total number of cards = 40
Total Number of red cards = 10
Total Number of black cards = 30
A player draws 7 cards from the deck and places them into their hand.
The remaining deck of 33 cards has 5 red cards and 5 black cards in the top 10 cards.
So,
Number of red cards remaining = 10 - 5 = 5
Number of black card remaining = 30 - 5 = 25
Total number of cards = 5 + 25 = 30
We have to draw 7 cards from 30 cards
Now
i)
the probability of the player's hand having 0 red cards
= probability of the player's hand having all the 7 cards black
ii)
The probability of the player's hand having 1 red cards
iii)
The probability of the player's hand having 2 red cards
iv)
The probability of the player's hand having 3 red cards
v)
The probability of the player's hand having 4 red cards
vi)
The probability of the player's hand having 5 red cards