20 people attend a party. 7 men are single and the rest are there with their wives. There are no children in the party. In all 10 women are present. Then the number of married men at the party is ?	Choose the correct choice from the following answers:
A) 5
B) 3
C) 7
D) 8
E) 9
Total people = number of men + number of women   20 = 7 + number of married men + 10   number of married men = 20-10-7= 
<gadget id="calculator">20-10-7</gadget>
<output>3</output>
3 men   ANSWER:3
<result>B</result>
20 people attend a party. 7 men are single and the rest are there with their wives. There are no children in the party. In all 10 women are present. Then the number of married men at the party is ?