In an exam, the avarage marks obtained by John in English, Maths, Hindi and Drawing were 50. His average marks in Maths, Science, Social Studies and Craft were 70. If the average marks in all seven subjects is 58, his score in maths was
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 74
|
Understanding |
Application |
|
In an exam, the average marks obtained by John in English, Math, Hindi and Drawing were 50. |
So, E + M + H + D = 50 × 4 ⇒ E + M + H + D = 200 …….. (1) |
|
Average marks in Maths, Science, Social Studies and Craft were 70. |
So, M + S + SS + C = 70 × 4 ⇒ M + S + SS + C = 280 …….. (2) |
|
Average marks in all seven subjects is 58. |
So, E + M + H + D + S + SS + C = 58 × 7 ⇒ E + M + H + D + S + SS + C = 406 ........ (3) |
|
From the equation 3. |
M = (200 + 280) – 406 M = 74 Hence, Score in Maths = 74 |