Advertisements
Advertisements
प्रश्न
If n(A) = 20, n(B) = 28 and n(A ∪ B) = 36 then n(A ∩ B) = ?
बेरीज
उत्तर
We have,
n(A) = 20, n(B) = 28 and n(A ∪ B) = 36
n(A ∪ B) = n(A) + n(B) - n(A ∩ B)
36 = 20 + 28 - n(A ∩ B)
36 = 48 - n(A ∩ B)
∴ n(A ∩ B) = 48 - 36
∴ n(A ∩ B ) = 12
shaalaa.com
Number of Elements in a Set
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
In a hostel there are 125 students, out of which 80 drink tea, 60 drink coffee and 20 drink tea and coffee both. Find the number of students who do not drink tea or coffee.
If P ⊆ M, then Which of the following set represent P ∩ (P ∪ M)?
Which of the following collections is a set?
If T = {1, 2, 3, 4, 5} and M = {3, 4, 7, 8} then T ∪ M = ?
If M is any set, then write M ∪ `phi` and M ∩ `phi`.
If n(A) = 7, n(B) = 13, n(A ∩ B) = 4, then n(A ∪ B) =?
