Step 1: Understanding Colour Mixing
When two primary colours mix, they form a secondary colour. Yellow and Blue are both primary colours.
Step 2: Applying the Rule of Colour Mixing
In the subtractive colour model used in painting and visual arts:
Yellow + Blue $\Rightarrow$ Green
This is a well-known rule from basic colour theory. The mixture of yellow and blue pigments gives rise to green due to the way light wavelengths are absorbed and reflected.
Step 3: Eliminating Incorrect Options
- (A) Red: Primary colour, but not formed by yellow + blue
- (C) Orange: Formed by Red + Yellow
- (D) Pink: Usually made from Red + White
Hence, the only valid option is Green.
\[
\boxed{\text{Green}}
\]
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.