Advertisements
Advertisements
प्रश्न
Let n(A) 30, n(B) = 27 and n(A∪B) = 45, find: n(A ∪B)
उत्तर
n(A) = 30, n(B) = 27 and n(A ∪ B) = 45
We know that,
n(A ∪B) = n(A) + n(B) – n(A ∪ B)
n(A∪B) = 31 +20 - 6 = 45
APPEARS IN
संबंधित प्रश्न
Write the cardinal number of the following set:
A = Set of days in a leap year.
Write the cardinal number of the following set:
B = Set of numbers on a clock-face.
Write the cardinal number of the following set:
E = Set of prime numbers between 5 and 15
Write the cardinal number of the following set:
F = {x : x ∈ Z and – 2 < x ≤ 5}
The set, given below, state whether it is finite set, infinite set or the null set:
{natural numbers more than 100}
The set, given below, state whether it is finite set, infinite set or the null set:
{multiples of 8}.
The set, given below, state whether it is finite set, infinite set or the null set:
{coins used in India}
If A = {x: x is natural number divisible by 2 and x< 16} and
B = {x:x is a whole number divisible by 3 and x < 18}, find: n(B).
If A = {x: x is natural number divisible by 2 and x< 16} and
B = {x:x is a whole number divisible by 3 and x < 18}, find: A ∩ B and n (A ∩ B).
Let n(A) = 31, n(B) = 20 and n(A ∩ B) = 6, find: n (A - B).
