Saved Bookmarks
| 1. |
there are total 280 students in 3 section a b and c of a class. the number of section a students is a is 28 more than section c. the average mark of all three section is 36.the average mark of section b section is 28. the section a and c average is equal to 42.what is the difference between number of students in b and c |
|
Answer» Total number of students in section A and B = 25 + 20 = 45Average score of both the SECTIONS = 28∴ Total score of both the sections = 28 X 45 = 1260Total score of section A = 25 x 30 = 750Let the average score of section B = xThen, total score of section B = 20xGiven, 20x + 750 = 1260⇒20x=510⇒x=25.5Step-by-step explanation: |
|