Walter o rekile diapole di le 60 kwa lebenkeleng. O jele 2/5 ya tsone mme a fa kgaitsadie 25% ya tse di setseng. Fa a bo a rekisetsa malomaagwe diapole tse di setseng ka $3 nngwe le nngwe, o ne a bona bokae? 

Sally received the following scores on her math quizzes: 50, 80, 80, 60, 40, 90, 100, 70, and 60. Find her mean score.
Mo diapoleng di le 60 tse Walter a di reketseng, o jele 2/5*60=<<2/5*60=24>>24
Palo ya diapole tse di setseng e ne e le 60-24=<<60-24=36>>36
Walter o file kgaitsadie 25/100*36=<<25/100*36=9>>9 
O ne a sala le diapole di le 36-9=<<36-9=27>>27.
O ne a bo a rekisa diapole tseo ka 27*$3=$<<27*3=81>>81 kwa go malomaagwe.
#### 81 

Sally's total score is 50 + 80 + 80 + 60 + 40 + 90 + 100 + 70 + 60 = <<50+80+80+60+40+90+100+70+60=630>>630.
Her mean score is 630 / 9/quizzes = <<630/9=70>>70/quiz.
#### 70