Let $U = \{x : x$ is a positive integer$\}$, $A = \{x : x 5\} \subset U$, $B = \{x : 5x

Question

Let $U = \{x : x$ is a positive integer$\}$, $A = \{x : x > 5\} \subset U$, $B = \{x : 5x < 12\} \subset U$. Then $n(A \cap B)$ = ?

Accepted Answer

0

Answer

1

Answer

2

Answer

5

Let U={x:xU = \{x : xU={x:x is a positive integer}\}}, A={x:x>5}⊂UA = \{x : x > 5\} \subset UA={x:x>5}⊂U, B={x:5x<12}⊂UB = \{x : 5x < 12\} \subset UB={x:5x<12}⊂U. Then n(A∩B)n(A \cap B)n(A∩B) = ?