3/5 of all married couples have more than one child. 1/4 of all married couples have more than 3 children. What fraction of all married couples have 2 or 3 children?
Choose the most appropriate option
A) 1/5 B) B.1/4 C) 7/20 D) 3/5 E) It cannot be determined from the given information.
Plug in simple numbers. Take 100 couples for example.   3/5 of 100 couples have more than one child = 60 couples.   1/4 of 100 couples have more than 3 kids = 25 couples.   This implies that 25 couples are a subset of 60 couples and the complement of 60 couples within those 100 couples, which equals 40 couples have either one or no kids at all.   We need to find couples that have 2 or 3 kids, so essentially, it is  60 - 25= 
<gadget id="calculator"> 60 - 25</gadget>
<output>35</output>
35. Fraction will be 35/100= 7/20.   Option 7/20
<result>C</result>
3/5 of all married couples have more than one child. 1/4 of all married couples have more than 3 children. What fraction of all married couples have 2 or 3 children?