Number of subset of a given set

Q.

A set contains $2n+1$ elements .The number of subsets of this set containing more than $n$ elements is equal to?

1. $2^{n-1}$

2. $2^n$

3. $2^{n+1}$

4. $2^{2n}$

Q. The number of non-empty subsets of the set $\{1,2,3,4\}$ is

1. 15
2. 14
3. 16
4. 17

Q. If $A$ and $B$ are two sets containing four and two elements, respectively. Then, the number of subsets of the set $A\times B$ each having atleast three elements are

1. 219
2. 256
3. 275
4. 510

Q. A set contains 2n+1 elements. The number of subsets of this set containing more than n elements is equal to

1. $2^n$
2. $2^{n+1}$
3. $2^{2n}$
4. $2^{n-1}$

Q. If a set A has n elements, then the total number of subsets of A is

1. $n$
2. $2^n$
3. $n^2$
4. $2n$

Q.

If a set A has n elements, then the total number of subsets of A is

1. n

2. $n^2$

3. $2^n$

4. 2n

Q. Let $S=\{0,1,5,4,7\}$. Then the total number of subsets of S is

1. 64
2. 32
3. 40
4. 20

Q.

A set S has 7 elements. How many subsets having at most 5 elements does it have?

1. 125

2. 120

3. 116

4. 128