The average score of 36 students is 40. When a group of 12 new students joins, the average rises to 44. Find the average score of the new students.
Show answer & explanation
Correct answer: B
Explanation
Given:
Average of 36 students = 40
New students = 12
New average = 44
Total marks of 36 students = 36 × 40 = 1440
Total marks of 48 students = 48 × 44 = 2112
Total marks of 12 new students = 2112 − 1440 = 672
Average of new students = 672 / 12 = 56