Step 1: Analyzing the data trend.
Observing the production data of all toy categories over the years, we check for a continuous increase.
Step 2: Identifying Monopoly’s trend.
- Monopoly’s production has increased every year without any decrease.
- Other categories (Ludo, Chess, Carrom) have at least one drop in production over the years. Thus, the correct answer is (C) Monopoly.
Let $ a_1, a_2, a_3, \ldots $ be in an A.P. such that $$ \sum_{k=1}^{12} 2a_{2k - 1} = \frac{72}{5}, \quad \text{and} \quad \sum_{k=1}^{n} a_k = 0, $$ then $ n $ is:
The sum $ 1 + \frac{1 + 3}{2!} + \frac{1 + 3 + 5}{3!} + \frac{1 + 3 + 5 + 7}{4!} + ... $ upto $ \infty $ terms, is equal to