RRB NTPC · Question 37
Read the information and answer the question based on it In an examination, a student gets an average of 76.2 marks. The total marks for the five subjects are 500. His marks in 4 subjects are mentioned; calculate the marks obtained by the students in Social science marked as “x” in the table below.
| Subject | Maths | English | Sanskrit | Science | Social Science |
|---|---|---|---|---|---|
| Marks Obtained | 76 | 87 | 83 | 78 | X |
A. 60 B. 58 C. 57 D. 65
Show answer & explanation
Answer: (A) C
Explanation
An average of 76.2 over 5 subjects means a total of 76.2 × 5 = 381. The four known marks add to 76 + 87 + 83 + 78 = 324. So the Social Science mark x = 381 − 324 = 57.