Discuss Forum
1. A student scored 80 marks in his first test. After taking the third test, his average dropped from 82 to78 . What is the average of his 2nd and 3rd tests ?
- A. 57
- B. 57
- C. 57
- D. 57
Answer: Option C
Explanation:
2nd Test's Marks = 2x82 - 80 = 84
3rd Test's Marks = 3x78 - 2x2 = 234 - 164 = 70
The average of his 2nd and 3rd tests' marks = (84 + 70)/2 = 154/2 = 77.
3rd Test's Marks = 3x78 - 2x2 = 234 - 164 = 70
The average of his 2nd and 3rd tests' marks = (84 + 70)/2 = 154/2 = 77.
Post your comments here: