CAPS · Grade 8 · C
The marks (out of 50) of 9 learners in a EMS test were: 10; 27; 17; 40; 27; 31; 27; 25; 12. The mark of 40 is later disqualified for dishonesty and removed from the results. Every learner then receives a bonus adjustment of −3 marks. After the removal, 8 learners remain. Calculate the mean mark (out of 50) after the adjustment.
Over its last 11 matches, the George netball team's mean number of goals per match was 26 goals. Meanwhile, over 7 matches earlier in the season, its mean was 17 goals per match. Altogether, the two groups cover 18 matches. Calculate the combined mean number of goals scored per match.
Over its last 8 matches, the Parys netball team's mean number of goals per match was 16 goals. After one more match, the mean across all 9 matches was 16 goals. How many goals did the team score in that match?
Sibusiso recorded the number of minutes spent on homework on each of 11 evenings: 40; 21; 40; 21; 41; 43; 37; 21; 13; 30; 32. On the next evening, Sibusiso spent 33 minutes on homework. In total, there are now 12 evenings. Calculate the mean number of minutes spent on homework per evening for all 12 evenings.
The George netball team scored the following numbers of goals in its last 9 matches: 24; 20; 29; 30; 25; 25; 15; 18; 25. Every recorded score is then corrected by +2 goals. In its next match, the team scored 29 goals. In total, there are now 10 matches. Calculate the mean number of goals scored per match after the adjustment.
The daily minimum temperature (in °C) in Ermelo was recorded over 10 days: 5; 3; 7; 2; 4; −5; 12; −2; 2; 2. The reading of 12 °C is later found to be a faulty-sensor error and is removed from the results. After the removal, 9 days remain. Calculate the mean daily minimum temperature for the remaining 9 days.
Over its last 10 matches, the George netball team's mean number of goals per match was 26 goals. After one more match, the mean across all 11 matches was 26 goals. How many goals did the team score in that match?
The daily minimum temperature (in °C) in Ermelo was recorded over 9 days: 15; 7; 6; 14; −4; 5; 8; −4; −1. On the next day, the minimum temperature was 14 °C. In total, there are now 10 days. Calculate the mean daily minimum temperature for all 10 days.
The Standerton netball team scored the following numbers of goals in its last 8 matches: 33; 23; 21; 23; 19; 18; 27; 23. The 33-goal result is later found to be a scoring error and is removed from the results. Every recorded score is then corrected by +4 goals. After the removal, 7 matches remain. Calculate the mean number of goals scored per match after the adjustment.
Over 7 evenings, Anele's mean homework time was 22 minutes. Over a further 6 evenings, the mean was 15,5 minutes. Altogether, the two groups cover 13 evenings. Calculate the combined mean number of minutes spent on homework per evening.
The marks (out of 50) of 7 learners in a EMS test were: 37; 27; 28; 18; 21; 36; 20. Every learner then receives a bonus adjustment of −3 marks. One more learner then writes the test and scores 37. In total, there are now 8 learners. Calculate the mean mark (out of 50) after the adjustment.
The mean mark (out of 50) of 11 learners in a EMS test was 29. In a second EMS class of 11 learners, the mean mark was 26. Altogether, the two groups cover 22 learners. Calculate the combined mean mark (out of 50).