The trading card game Magic: the Gathering requires a deck to consist of at least 60 cards.The game begins with each player drawing an opening hand of 7 cards. Some of these cardsneed to be land cards, and how many you need depends on what kind of deck you arebuilding.Let’s say your deck needs an opening hand with either 2 or 3 land cards in it in order toconsistently execute your strategy. As you’re building the deck, you have a tough decisionto make: do you build a deck of 60 cards, including 20 land cards, OR do you add 1 moreland card, for a 61-card deck containing 21 lands, just to be safe? Let’s use our probabilitytools to determine if the extra land is worth it:(a) What is the probability of getting exactly 2 or 3 land cards in your openinghand if your deck has 20 land cards and 40 non-land cards in it?(b) What is the probability of getting exactly 2 or 3 land cards in your openinghand if your deck has 21 land cards and 40 non-land cards in it?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The trading card game Magic: the Gathering requires a deck to consist of at least 60 cards.
The game begins with each player drawing an opening hand of 7 cards. Some of these cards
need to be land cards, and how many you need depends on what kind of deck you are
building.
Let’s say your deck needs an opening hand with either 2 or 3 land cards in it in order to
consistently execute your strategy. As you’re building the deck, you have a tough decision
to make: do you build a deck of 60 cards, including 20 land cards, OR do you add 1 more
land card, for a 61-card deck containing 21 lands, just to be safe? Let’s use our probability
tools to determine if the extra land is worth it:
(a) What is the probability of getting exactly 2 or 3 land cards in your opening
hand if your deck has 20 land cards and 40 non-land cards in it?
(b) What is the probability of getting exactly 2 or 3 land cards in your opening
hand if your deck has 21 land cards and 40 non-land cards in it?
 
 
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