the road not taken - demo class

Road To Peace

in a class of "100" students,the mean marks obtained in a subject is "30" and in and class of "50" students the mean marks obTained in the same subject is "60." find the marks obtained by the students of the two classes taken together.

The Road Not Taken Detailed Explanation Part 1

The Road Not Taken Detailed Explanation Part 2

The following table shows the number of classes taken by each Teacher in different days and the total number amount given to the Teacher per class For the certain course also given If the amount of Rs. 1.56 lakhs was given to the Ravikant for 3 weeks, then find the number of class/ classes taken by him on thursday and Friday each ?