AILET 2019 BA LLB Question Paper with answer key for online practice

Class XII of XYZ International School has three sections - K, L and M. In Mathematics examination, the average marks obtained by these sections are 72, 60 and 50 respectively. The average marks of sections K and L taken together is 69. If the ratio of the number of students in sections L and M is 6 : 7, what is the average score of all the three sections put together ?