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in a school 95 boys appeared for a physical test for selection in NCC and boy Scouts among them 21 boys got selected in NCC as well as boy Scouts 44 boys were not selected in boys Scouts and 20 boys were not selected only in boy scouts draw a Venn diagram 6. In a school 95 boys appeared for a physical test for selection in NCC and Boys Scouts. Among them, 21 boys got selected in NCC as well as Boy Scouts, 44 boys were not selected in Boy Scouts, and 20 boys were not selected only in Boy Scouts draw Venn diagrams and find: (i) how many boys did not get selected in NCC and Boy Scouts? (ii) how many boys did not get selected only in NCC? (iii) how many boys got selected in NCC? (iv) how many boys got selected in Boy Scouts? (v) how many boys got selected in NCC but not Boy Scouts?
(Hint: Solving the question will be easier if you begin with a Venn diagram for boys who did not get selected).
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Syllabus
22. AB is the diameter of a given circle with centre O. If PA=PB and PAC=20o, find the value of PAB and ABC.
44. A dishonest shopkeeper pretends to sell his goods at price but uses false
weights and gains For a weight of 1 kg he uses :
(a) a weight Of 875
(c) a weight Of 950 gm
(b) a weight Of 900 gm
(d) None Of these
45.45. A dealer professing to sell his goods at cost price,' 900 gm weight for 1
kg. His gain percent is :
a. 9% b. 10% c. 11% d.
46. By using a false weight, a dealer defrauds his customers by in purchasing
and by 5% in selling. His gain percent is :
(a) 10%
(b) 2.5%
(c) 10.25%
(d) None of these
in a school 95 boys appeared for a physical test for selection in NCC and boy Scouts among them 21 boys got selected in NCC as well as boy Scouts 44 boys were not selected in boys Scouts and 20 boys were not selected only in boy scouts draw a Venn diagram
6. In a school 95 boys appeared for a physical test for selection in NCC and Boys Scouts. Among them, 21 boys got selected in NCC as well as Boy Scouts, 44 boys were not selected in Boy Scouts, and 20 boys were not selected only in Boy Scouts draw Venn diagrams and find:
(i) how many boys did not get selected in NCC and Boy Scouts?
(ii) how many boys did not get selected only in NCC?
(iii) how many boys got selected in NCC?
(iv) how many boys got selected in Boy Scouts?
(v) how many boys got selected in NCC but not Boy Scouts?
(Hint: Solving the question will be easier if you begin with a Venn diagram for boys who did not get selected).
a) 15,24 b)30,49
1. All students in a school.
2. All planet in our solar system.
(i) A1 = {–2, –1, 1, 3, 5}
(ii) A2 = {x : x ∈ N and 3 ≤ x < 7}
(iii) A3 = {p : p ∈ W and 2p – 3 < 8}
(iv) A4 = {b : b ∈ Z and –7 < 3b – 1 ≤ 2}
2. If P = {p : p is a letter in the word 'PERMANENT'}, find n(P).
Ans my ques having doubt how to solve
4. Let the universal set be U ={x ; x W and x < 9}. Also, A = {factors of 6} and B = {factors of 8}. Find the following sets.
(i) A'
(ii) B'
(iii) A' B'
(iv) A' B'
Also, verify the following
(a) (A B)' = A' B'
(b) (A B)' = A' B'
(c) A (B C) = (A B) (A C)
(d) A (B C) = (A B) (A C)
Plz tell the answer of 5th question
5. Given the universal set = { x : x N and x < 20}, find :
(i) A = {x : x = 3p ; pN}
(ii) B = {y : y = 2n + 3, nN}
(iii) C = {x : x is divisible by 4}
4. Let the universal set be U = {x : x ∈ W and x < 9}. Also, A = {factors of 6} and B = {factors of 8}. Find the following sets.
(i) A'
(ii) B'
(iii) A' ∩ B'
(iv) A' ∪ B'
Also, verify the following.
(a) (A ∪ B)' = A' ∩ B'
(b) (A ∩ B)' = A' ∪ B'
(c) A ∪ (B ∩ C) = (A ∪ B) ∩ (A ∪ C)
(d) A ∩ (B ∪ C) = (A ∩ B) ∪ (A ∩ C)
How to do
7. If and then find
(vii)
Plz fast
1. x belongs to set A.
2. y is not an element of B.
3. x and y are element of C.
4. a, b and c belong to D.
5. Cardinal number of set M is equal to p.
Please give me ans plssss
Q. Write each of the following sets in Roster form and write its
(iii) C = {x : x N, x is a perfect square, x < 30}
(iv) D = {x : x e N, x is a composite number, 10 < x < 18}