Question

if a={1,2,5,6,7}, b={2,4,6,7,8,9,10} then find n(a), n(b), n(aub), n(anb)​

Answer 1

Answer:

Step-by-step explanation:

A={1,2,5,6,7}, B={2,4,6,7,8,9,10}

$A\cap B= \{2,6,7\} \text{ and } A\cup B = \{1,2,4,5,6,7,8,9,10\}.$

Therefore n(A)=5, n(B)= 7, $n(A\cup B) =$9, $n(A \cap B)=3$

Answer 2

Answer:

n(a) = 5

n(b) = 7

n(a ∪ b) = 9

n(a ∩ b) = 3

Step-by-step explanation :

Numbers of elements in set a = 5

Therefore, n(a) = 5

Numbers of elements in set b = 7

Therefore, n(b) = 7

Numbers of elements in set a and b = 9

Therefore, n(a ∪ b) = 5

Numbers of common elements in set a and b = 3

Therefore, n(a ∩ b) = 3