Question
For a random variable $X$, the total probability of its different values is $3 C-1$. Find the value of $C$.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Particulars | $x$ | $y$ |
| Mean | $60$ | $25$ |
| Standard deviation | $6$ | $3$ |
| Covariance | $10.4$ |