A student secures 90%, 60% and 54% marks in test papers with 100, 150 and 200 respectively as maximum marks. The percentage of his aggregate is 


(a) 
64 
(b) 
68 
(c) 
70 
(d) 
None of these 
A student secures 90%, 60% and 54% marks in test papers with 100, 150 and 200 respectively as maximum marks. The percentage of his aggregate is 


(a) 
64 
(b) 
68 
(c) 
70 
(d) 
None of these 
Total marks secured = (90% of 100 + 60% of 150 + 54% of 200)
=
Total maximum marks = 100 + 150 + 200 = 450.
Aggregate percentage =