A student scores 85 in Maths, 91 in Science, 87 in English and 81 in History, the average score is decreased by 6, if the marks of Geography are also included. How many marks are obtained in Geography?a)56b)64c)68d)76Correct answer is option 'A'. Can you explain this answer?

Question

Answer

To find the marks obtained in Geography, we need to first calculate the average score without including Geography and then find the difference between the original average and the decreased average.

Let's calculate the average score without including Geography:

Total score = Maths + Science + English + History
= 85 + 91 + 87 + 81
= 344

Average score without Geography = Total score / Number of subjects
= 344 / 4
= 86

Now, let's calculate the decreased average score:

Decreased average = Average score without Geography - 6
= 86 - 6
= 80

To find the marks obtained in Geography, we need to find the difference between the original average (86) and the decreased average (80):

Marks obtained in Geography = Original average - Decreased average
= 86 - 80
= 6

Therefore, the marks obtained in Geography is 6.

However, none of the options provided (A, B, C, D) matches the calculated answer. So, the correct answer cannot be determined with the given options.

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