<prompt> Bala kakaretso ea lilemo tsa litho tsa Piano Lesson GroupLitho tsa Piano Lesson Group ke Maria lilemo tse 8, Tyler lilemo tse 9, Jessica lilemo tse 7, le John lilemo tse 11.  <response>: Instruction in English: Calculate the average age of the members of the Piano Lesson Group . Response in English: The average age of the members of the Piano Lesson Group can be calculated by adding the ages of all members 8 9 7 11 35 and dividing this by the total number of members 4. Therefore, the average age of the members of the Piano Lesson Group is 35 4 8.75 years old. . Response in Sesotho: Karolelano ea lilemo tsa litho tsa Piano Lesson Group e ka baloa ka ho eketsa lilemo tsa litho tsohle 8 9 7 11 35 le ho arola sena ka palo eohle ea litho 4. Ka hona, ka karolelano lilemo tsa litho tsa Piano Lesson Group ke 35 4 8.75 lilemo. 