HARD
11th CBSE
IMPORTANT
Earn 100

In a town of 10,000 families, it was found that 40% of the families buy newspaper A, 20% buy newspaper B, 10% buy newspaper C, 5% buy A and B; 3% buy B and C, and 4% buy A and C. If 2% buy all the three newspapers, find the number of families which buy A only

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Important Questions on Sets

HARD
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1G>Q 14
In a town of 10,000 families, it was found that 40% of the families buy newspaper A, 20% buy newspaper B, 10% buy newspaper C, 5% buy A and B; 3% buy B and C, and 4% buy A and C. If 2% buy all the three newspapers, find the number of families which buy B only
HARD
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1G>Q 14
In a town of 10,000 families, it was found that 40% of the families buy newspaper A, 20% buy newspaper B, 10% buy newspaper C, 5% buy A and B; 3% buy B and C, and 4% buy A and C. If 2% buy all the three newspapers, find the number of families which buy none of A, B, and C.
HARD
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1G>Q 15
A class has 175 students. The following description gives the number of students one or more of the subjects in this class: mathematics 100, physics 70, chemistry 46, mathematics and physics 30; mathematics and chemistry 28; physics and chemistry 23; mathematics, physics and chemistry 18. Find how many students are enrolled in mathematics alone, physics alone and chemistry alone.
MEDIUM
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1G>Q 15
A class has 175 students. The following description gives the number of students one or more of the subjects in this class: mathematics 100, physics 70, chemistry 46, mathematics and physics 30; mathematics and chemistry 28; physics and chemistry 23; mathematics, physics and chemistry 18. Find the number of students who have not offered any of these subjects.
EASY
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1H>Q 1
If a set A has n elements then find the number of elements in its power set P(A).
MEDIUM
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1H>Q 2
If  A = ϕ then write P(A).
EASY
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1H>Q 3
If n(A) = 3 and n(B) = 5, find the maximum number of elements in A ∪ B
EASY
11th CBSE
IMPORTANT
Senior Secondary School Mathematics FOR CLASS 11>Chapter 1 - Sets>EXERCISE 1H>Q 3
If n(A) = 3 and n(B) = 5, find the minimum number of elements in A∪B