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Application of Derivatives
NCERT Exemplar Class 12
CBSE
Grade 12

Question:

The total revenue in Rupees received from sale of $x$ units of a product is given by $R(x) = 3x^2 + 36x + 5$. The marginal revenue when $x = 15$ is:
(a) $126$
(b) $116$
(c) $96$
(d) $136$

Step-by-Step Solution

MR = R'(x) = 6x + 36. MR(15) = 6(15) + 36 = 126. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Selecting $126$: 1.0 Mark

Correct Answer: $126$
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