MCQ
The number of subsets of a set containing n elements is
- A$2^{ n }-1$
- B$2^n-2$
- C$2^n$
- Dn
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In a town of 840 persons, 450 persons read Hindi, 300 read English and 200 read both. Then the number of persons who read neither is,
The value of $\sin(45^\circ+\theta)-\cos(45^\circ-\theta)$ is:
$2\cos\theta$
$2\sin\theta$
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