Shirts The soccer team’s shirts have arrived in a bigbox, and people just start grabbing them, looking for theright size. The box contains 4 medium, 10 large, and6 extra-large shirts. You want a medium for you andone for your sister. Find the probability of each eventdescribed.a) The first two you grab are the wrong sizes.b) The first medium shirt you find is the third one youcheck.c) The first four shirts you pick are all extra-large.d) At least one of the first four shirts you check is amedium.
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
Shirts The soccer team’s shirts have arrived in a big
box, and people just start grabbing them, looking for the
right size. The box contains 4 medium, 10 large, and
6 extra-large shirts. You want a medium for you andone for your sister. Find the
described.
a) The first two you grab are the wrong sizes.
b) The first medium shirt you find is the third one you
check.
c) The first four shirts you pick are all extra-large.
d) At least one of the first four shirts you check is a
medium.
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