The table lists the eight human blood types. It also shows how blood types determine who a person can donate blood to and receive blood from. Blood type Can donate to Can receive from A+, AB+ B+, AB+ A+, A-, 0+, 0- B+, B-, 0+, 0- All blood types А-, В-, АВ-, О- A-, 0- В-, о- 0+, 0- A+ B+ AB+ AB+ АB+, АB- A+, A-, AB+, AB- B+, B-, AB+, AB- A+, B+, AB+, 0+ All blood types AB- A- B- 0- 0- Let U be the set of all eight human blood types. U= {A+,B+,AB+, AB-,A-,B-,0+,0-) Let X' be the set of blood types that type B- cannot donate blood to. Let Y be the set of blood types that type 0+ can receive blood from. AB Find the sets below. Write each answer in roster form or as Ø. AB x = 0 (a) X = (b) Y' = ]
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.
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