Subject Code: 1031 Set:1[MEAN]
NATIONAL EXAMINATION BOARD
SEE MODEL QUESTION 2080 (SET 1)[MEAN]
Subject: C. Maths
Time: 3 hours Full Marks:75
दिइएका निर्देशनका आधारमा आफ्नै शैलीमा सिर्जनात्मक उत्तर दिनुहोस् ।
सबै प्रश्नहरुको उत्तर दिनुहोस् (Answer all the questions)

Eight blood types are shown by the eight regions of the Venn diagram shown here. Each circle represents one of three antigens: A, B or Rh. If A and B are both absent, the blood type is O. If Rh is present, the blood type is positive (+); otherwise, it is negative (). The following table represents the blood types of 150 people.
Antigens  Number of people 
A  60 
B  27 
Rh  123 
A and B  12 
A and Rh  46 
B and Rh  17 
A and B and Rh  9 
 A,B र Rh ले क्रमश: A, B र Rh एन्टीजेनलाई जनाउँछ भने सबै समुहलाई गणनात्मकता सङ्केतमा लेख्नुहोस् ।
If A,B and Rh denote the set of people who have A, B र Rh Antigens in their blood respectively, write the cardinality notation of people for all groups.[1K]
 मााथिको जानकारीलाई भेनचित्रमा प्रस्तुत गर्नुहोस् ।
Show the above information in a Venn diagram. [1U]
 कति जना मानिसहरुमा ओ नेगेटिभ रगत समुह रहेछन् ? गणना गर्नुहोस् ।
How many people are having O negative blood? Calculate it. [3A]
 रगत प्राप्त गर्दा, प्राप्तकर्तासँग दाताको सबै एन्टिजेनहरू हुनुपर्छ। अब, ओ पोजेटिभ भएको व्यक्तीले कति जना मानिसलाई रगत दान गर्न सक्दछ?
When receiving a blood, the recipient must have all the antigens of the donor. If a person has O positive, to how many people he can donate the blood?[1HA]
Solution 👉 Click Here
Solution
Let
U is universal set of all antigens
Given that
A denote the set of people having A antigens
B denote the set of people having B antigens
Rh denote the set of people having Rh antigens
Thus
Cardinality of all surveyed people as Universal Set U is
\(n(U)=150\)
Now the itemwise solution are :
 If A,B and Rh denote the set of people who have A, B र Rh Antigens in their blood respectively, write the cardinality notation of people for all blood groups.
According the question,
Cardinality of set, people having A, B and Rh antigens is
\(n(A \cap B \cap Rh )=n(AB+)=9\)
Cardinality of set, people having A and Rh antigens only is
\(n_o(A \cap Rh )=n(A+)=469=37\)
Cardinality of set, people having B and Rh antigens only is
\(n_o(B \cap Rh )=n(B+)=179=8\)
Cardinality of set, people having A and B antigens only is
\(n_o(A \cap B )=n(AB)=129=3\)
Cardinality of set A, people having A antigens only is
\(n_o(A)=n(A)=603793=11\)
Cardinality of set B, people having B antigens only is
\(n_o(B)=n(B)=27893=7\)
Cardinality of set Rh, people having Rh antigens only is
\(n_o(Rh)=n(O+)=1233798=69\)
 Present the above information in a Venndiagram.
According the question,
The Venndiagram of given information are as follows.
 How many people are having O negative blood? Calculate it.
According to the Venndiagram given above
\(n(U)=150\)
or\(69+11+7+37+3+8+9+x=150\)
or\(x=6\)
Therefore,
The number of people having O negative blood is
\(n \overline{(A \cup B \cup Rh)}=6\)
 When receiving a blood, the recipient must have all the antigens of the donor. If a person has O+, to how many people he can donate the blood?
According to the solution
A person having O+ blood, can donate blood to
people having Rh antigens
people having O+,A+,B+, AB+ blood groups
Which is
\(n(Rh)=123\)
Thus, A person having O+ blood, can donate blood to 123 people
This completes the solution
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