Demorgan's law

Q.

Describe Partially Ordered Set

Q. $\mathrm{Let}n\left(U\right)=700,n\left(A\right)=200,n\left(B\right)=300,n(A\cap B)=100,\mathrm{then}n(A\cap B)=$

1. 400
2. 600
3. 500
4. 300

Q.

If the number of elements in each of universal set, set A and set B are represented as n(U), n(A), n(B) respectively, then the number of elements that are not in set A and not in set B is given by ___.

1. $n\left(AU{B}^{\prime }\right)$

2. $n\left(U\right)-n(A\cap B)$

3. $n\left(U\right)-n(A\cup B)$

4. $n\left(\right(A\cap B{)}^{\prime })$

Q. A survey shows that 63% of the Indians like Paneer whereas 76% like Tofu. If x% of the Indians like both Paneer and Tofu, then which of the following is/are correct?

1. Maximum value of x is 63.
2. Maximum value of x is 76.
3. Minimum value of x is 39.
4. Minimum value of x is 0.

Q.

In a survey of 300 android mobile users, who make video calls, 75 people said they use only viber, 45 use only skype and 90 people use both. The number of persons who use neither viber nor skype is __.

Q.

Of the 200 candidates who were interviewed for a position at a call center, 100 had a two-wheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both two-wheeler and credit card, 30 had both credit card and mobile phone and 60 had both two wheeler and mobile phone and 10 had all three. How many candidates had none of the three?

1. 0

2. 10

3. 20

4. 18