CBSE
3200
3300
3100
3000
135
45
90
180
C.
90
Tips: -
ધારો કે 4n(A) = 3n(B) = 2n(A∪B) = 12x
∴n(A) = 3x; n(B) = 4x તથા n(A∪B) = 6x મળે.
હવે, n(A∪B) = n(A) + n(B) - n(A∩)
∴ 6x = 3x + 4x - 15
∴ x = 15
∴ n(A∪B) = 6x = 6(15) = 90
10
7
9
6
(i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)
(i)-(b), (ii)-(c), (iii)-(d), (iv)-(a)
(i)-(a), (ii)-(c), (iii)-(b), (9iv)-(d)
(i)-(a), (ii)-(b), (iii)-(c), (iv)-(d)
1000
800
1100
1200
N-{9}
N
N ∪ {0}
{1, 3, 4, 5, 7, 9, 14}
(i) -(a), (ii) - (b), (iii) - (c), (iv) - (d)
(i) - (d), (ii) - (a), (iii) - (b), (iv) - (c)
(i) - (c), (ii) - (b), (iii) - (a), (iv) - (d)
આપેલ પૈકી એક પણ નહી
3
4
1
2
A = B
B = C
A = C
આપેલ પૈકી એક પણ નહી