Question

the mean of marks in mathematics of 40 students In class is 76 whereas the same for the other class of 50 students is 85 find the mean in mathematics of students in both the class together ​

Answer 1

Answer:

it would be 86 ..,...........

Answer 2

Answer:

81

Step-by-step explanation:

total marks of first class is

$40 \times 76 = 3040$

total marks of second class is

$50 \times 85 = 4250$

Therefore combined mean is

$\frac{3040 + 4250}{40 + 50} = \frac{7290}{90} = 81$