Step 1: Factors Affecting Development
The development of a country is not based solely on one factor. It is a multifaceted process influenced by various indicators, including per-capita income, literacy rates, and health conditions of the people.
Step 2: Understanding the Components of Development
- Per-capita Income: This reflects the economic well-being of individuals in the country. Higher per-capita income generally indicates a higher standard of living.
- Average Literacy Rate: Education is vital for the development of human resources and the overall economy.
- Health Condition of People: A healthy population is essential for economic productivity and overall social well-being.
Step 3: Why "Above All" is Correct
While each factor plays a significant role in development, it is the combination of all these aspects that determines the overall progress of a nation. Thus, the correct answer is Above all.
Thus, the correct answer is option (D) Above all.
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.