Question

There are 3 Sections A,B and C in classX with 25, 40 and 35 students respectively. The average marks obtained by Section A,B ands C are 70%, 65% abds 50% respectively. Find the average marks of entire class X.

Answer 1

Answer:

ur answer is in attachment

Answer 2

Answer:

The average mark of the entire class is 61%

Step-by-step explanation:

The number of students in section A is 25

The marks obtained by section A is

= 17 × 25

= 1750

The number of students in section B is 40

The marks obtained by section B is  

= 65 × 40

= 2600

The number of students in section C is 35

The marks obtained by section C is

= 50 × 35

= 1750

Total marks = 1750 + 2600 + 1750 = 6100

Total number of students =  25 + 40 + 35 = 100

The average mark of entire class X is given by

$=\frac{6100}{100}$

= 61%

Therefore the average mark of the entire class is 61%