The following tables shows the world production of steel in 1920-1927. Study the table and answer the question.
The number of years during which the company has its production less than the average production during 1920-1927 is approximately:
Average production of the steel = $$\frac{71.3+43.51+67.66+76.23+77.23+88.93+91.75+100.17}{8}=\frac{616.78}{8}=77.10$$
$$\therefore\ $$In 1920, 1921, 1922, 1923 the company has its production less than the average production
Hence, the correct answer is Option D
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