More than ........... $%$ of the world population live in arid or semiarid regions.

40

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50

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60

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80

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Solution

The correct option is A $40$
The arid region is a region which is characterized by a severe lack of available water. Due to lack of water, it prevents and hinders the growth and development of plant and animal life. Arid climates tend to lack vegetation. The semiarid region is partially dry or partially arid. It is intermediate between arid and humid climate. More than 40% of the world population live in arid or semiarid regions.
Thus, the correct answer is '40.'

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$\begin{matrix} Age & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 (in years) Number of patients & 90 & 50 & 60 & 80 & 50 & 30 \end{matrix}$

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More than ........... % of the world population live in arid or semiarid regions.

More than ........... $%$ of the world population live in arid or semiarid regions.