Step 1: Understanding Transparent Colours.
Transparent colours allow light to pass through, revealing the underlying surface. Watercolour is a transparent medium, meaning it can be applied in thin washes, allowing the texture and features of the paper to show through.
Step 2: Verifying the Options.
- Option (1): Watercolour is the most transparent colour medium.
- Option (2): Oil colours are typically opaque and not transparent.
- Option (3): Poster colours are generally opaque and not transparent.
- Option (4): Pastels can be applied thickly and are generally not transparent.
Conclusion:
Therefore, the correct answer is (1) Water colour.
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.