Step 1: Understanding Opposite Colours.
In colour theory, the opposite colour of white is black. Black and white are considered opposite because they represent extremes in terms of lightness and darkness. White is the lightest colour, and black is the darkest.
Step 2: Verifying the Options.
- Option (1): Red is not the opposite of white.
- Option (2): Black is the opposite of white, making it the correct answer.
- Option (3): Blue is a primary colour and not the opposite of white.
- Option (4): Yellow is a primary colour and not the opposite of white.
Conclusion:
Therefore, the correct answer is (2) Black.
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.