Science (English Medium) Class 11 - CBSE Question Bank Solutions

In a class of 60 students, 25 students play cricket and 20 students play tennis, and 10 students play both the games. Then, the number of students who play neither is ______.

In a town of 840 persons, 450 persons read Hindi, 300 read English and 200 read both. Then the number of persons who read neither is ______.

A survey shows that 63% of the people watch a News Channel whereas 76% watch another channel. If x% of the people watch both channel, then ______.

If sets A and B are defined as A = `{(x, y) | y = 1/x, 0 ≠ x ∈ "R"}` B = {(x, y) | y = – x, x ∈ R}, then ______.

Let S = {x | x is a positive multiple of 3 less than 100}
P = {x | x is a prime number less than 20}. Then n(S) + n(P) is ______.

The set {x ∈ R : 1 ≤ x < 2} can be written as ______.

If A and B are any two sets, then A – B is equal to ______.

State True or False for the following statement.

Let sets R and T be defined as
R = {x ∈ Z | x is divisible by 2}
T = {x ∈ Z | x is divisible by 6}. Then T ⊂ R

Given A = {0, 1, 2}, B = {x ∈ R | 0 ≤ x ≤ 2}. Then A = B.

Find the domain and range of the relation R given by R = {(x, y) : y = `x + 6/x`; where x, y ∈ N and x < 6}.

Is the following relation a function? Justify your answer

R₁ = `{(2, 3), (1/2, 0), (2, 7), (-4, 6)}`

Is the following relation a function? Justify your answer

R₂ = {(x, |x |) | x is a real number}

Given R = {(x, y) : x, y ∈ W, x² + y² = 25}. Find the domain and Range of R.

If R₁ = {(x, y) | y = 2x + 7, where x ∈ R and – 5 ≤ x ≤ 5} is a relation. Then find the domain and Range of R₁.

If R₂ = {(x, y) | x and y are integers and x² + y² = 64} is a relation. Then find R₂.

If R₃ = {(x, x) | x is a real number} is a relation. Then find domain and range of R₃.

Is the given relation a function? Give reasons for your answer.

h = {(4, 6), (3, 9), (– 11, 6), (3, 11)}

Is the given relation a function? Give reasons for your answer.

f = {(x, x) | x is a real number}

Is the given relation a function? Give reasons for your answer.

g = `"n", 1/"n" |"n"` is a positive integer

Is the given relation a function? Give reasons for your answer.

s = {(n, n²) | n is a positive integer}