intermediate(ipc)course (no) (1460 Points)
16 March 2012|
swati ghosh  no [edit] [edit photo] [ Scorecard : 473] |
Posted about 3 hours ago   |
|
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 |
Piyush Tanwar
(Assistant Manager - Accounts)
(1432 Points)
Replied 16 March 2012
Total age of 10 students=10*20=200
Total age of 2 new students = 2X
(Assuming the average age of 2 students be X.)
Hence the equation=200+2X=12*22= 264
solving the equation we get x=32
So, average age of the new students = 32
intermediate(ipc)course
(no)
(1460 Points)
Replied 16 March 2012
if x is inversely related with square of y for x =1 & y=2 then find the value of x when y=6 :
a).3 b).9
c).1/3 d).1/9
CAclubindia
