Maths

Author Manisha Gupta asked on 2019-07-22 13:26:00

The average marks of students of section A and B are respectively 60 and 70. The number of students in Section A is 47 and in section B 53.the average marks of both sections taken together are  

Answer =60*47+70*53/47+53 = 60(40+7) + 70(50+3) / 100

= 6(40+7)+7(50+3)/10

=240+42+350+21/10

=653/10=65.3