Durga prasad (Student CA CPT ) (116 Points)
10 June 2013plz............ explain......
1)Average age of a group of 10 students is 20 years,
if average age increased by two years when two new
students are joined then the average age of two new students
a) 84 b) 64 c) 32 d) 42
2)If x is inversely related with square of y for x = 1 and y = 2 then find the value of x when y = 6
a) 3 b) 9 c)1\3 d)1\9
CA Suraj Lakhotia
(IndigoLearn)
(4898 Points)
Replied 10 June 2013
Avg age of ten students = 20 years, Sum of Ages = 200
Avg age of 12 = 22, Sum of Ages = 264
Increase in Sum of Age = 64
Average increase = 32
CA Suraj Lakhotia
(IndigoLearn)
(4898 Points)
Replied 10 June 2013
x= a/y^2
when X=1, Y=2, a=4
Thus the equation is x=4/y^2
When y=6,
X= 4/36
x = 1/9
CAclubindia
