The average age of 6 persons living in a house is 23.5 years. Three of them are majors and their average age is 42 years. The difference in ages of the three minor children is same  Pick:
A) 6 years
B) 5 years
C) 3 years
D) 8 years
E) 9 years
B   5 years   Total age of six persons = 23.5 × 6 = 141 years Total age of three major persons = 42 × 3 = 126 years   ∴ Total age of three minor children = 141 – 126 = 15 years The difference in ages of the three minor children is same. Therefore, we take ages may be: 5, 5, 5; 3, 5, 7; 2, 5, 8 and 1, 5, 9 In all the cases, median will be 5 years   Mean age of minor children = 15/3= 
<gadget id="calculator">15/3</gadget>
<output>5</output>
5 years
<result>B</result>
The average age of 6 persons living in a house is 23.5 years. Three of them are majors and their average age is 42 years. The difference in ages of the three minor children is same