Question

n(B) = 20, n(A ∩ B) = 10, n(A U B) =40, then find n(A) *​

Answer 1

$\large\bf\underline {To \: find:-}$

• we need to find n(A)

$\large\bf\underline{Given:-}$

• n(B) = 20, n(A ∩ B) = 10, n(A U B) =40

$\huge\bf\underline{Solution:-}$

➻ BY using Formula :-

$\underline {\boxed{ \bf \red{n(A \cup \: B) + n(A \cap \: B) = n(A) + n(B)}}}$

➼ n(A) = n(A ∪ B) + n(A ∩ B) - n(B)

• n(B) = 20
• n(A ∩ B) = 10
• n(A ∪ B) = 40

➻ n(A) = 40 + 10 - 20

➻ n(A) = 50 - 20

➻ n(A) = 30

Hence ,

• ➺ Value of n(A) is 30

━━━━━━━━━━━━━━━━━━━━━━━━━

Answer 2

Answer:

The answer of our question is below

Step-by-step explanation:

mark me as the brainliest plzzz