Let $U = \{ x \mid x$ is a natural number $

Question

Let $U = \{ x \mid x$ is a natural number $< 18 \}$
$A = \{ x \mid x$ is an odd natural number $\}$
$B = \{ x \mid x$ is a prime number $\}$.
Find $n ( A \cup B )$. Note: prime numbers are $2,3,5,7,11,13,17,19$.
A) $n ( A \cup B ) = 15$
B) $n ( A \cup B ) = 10$
C) $n ( A \cup B ) = 3$
D) $n ( A \cup B ) = 9$

Quizplus · Accepted Answer

The Answer of Let $U = \{ x \mid x$ is a natural number $< 18 \}$
$A = \{ x \mid x$ is an odd natural number $\}$
$B = \{ x \mid x$ is a prime number $\}$.
Find $n ( A \cup B )$. Note: prime numbers are $2,3,5,7,11,13,17,19$.
A) $n ( A \cup B ) = 15$
B) $n ( A \cup B ) = 10$
C) $n ( A \cup B ) = 3$
D) $n ( A \cup B ) = 9$

Let U={x∣xU = \{ x \mid xU={x∣x Is a Natural Number <18}< 18 \}<18}

Let $U = \{ x \mid x$ Is a Natural Number $< 18 \}$