Q. If $n(A) = 4,\ n(B) = 3,\ n(A \times B \times C) = 240$, then $n(C)$ is equal to

A) 288
B) 1
C) 12
D) 2
Explanation

(d)
$\because\ \ \ \ \ \ \ \ \ \ \ \ n(A \times B \times C) = n(A) \times n(B) \times n(C)$
$\therefore\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ n(C) = \frac{24}{4 \times 3} = 2$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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