MCQ
$\tan ^{-1} \frac{1}{2}+\tan ^{-1} \frac{1}{4}=\ldots \ldots$.
- A$\tan ^{-1} \frac{3}{2}$
- ✓$\tan ^{-1} \frac{6}{7}$
- C$\tan ^{-1} \frac{5}{6}$
- D$\tan ^{-1} \frac{1}{2}$
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| X | 2 | 3 | 4 | 5 |
| $P(X)$ | $\frac{5}{k}$ | $\frac{7}{k}$ | $\frac{9}{k}$ | $\frac{11}{k}$ |