The number of subsets of a set containing n distinct object is

The number of subsets of a set containing n distinct object is

A
$^{n} C_{1} +^{n} C_{2} +^{n} C_{3} + \dots +^{n} C_{n - 1}$
B
$2^{n} - 1$
C
$^{n} C_{0} +^{n} C_{1} + \dots +^{n} C_{n}$
D
$2^{n} + 1$

Solution:

Use: The number of subsets containing exactly $r$ elements is n $^{n} C_{r}$

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