NCERT says that more than 25 per cent of the drugs sold today are derived from plants…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
NCERT says that more than per cent of the drugs sold today are derived from plants. A health agency lists drugs.
- What is the least number of these drugs that come from plants?
- What is the greatest number that do not come from plants?
- A bigger list has drugs. What is the least number from plants?
Need a reminder? The key ideaShow
Narrow utilitarian reasons are direct uses, such as food and medicines. Broad utilitarian reasons are services, such as pollination and oxygen. The ethical reason says that every species has a value of its own. Costanza estimated nature's services at about 33 trillion US dollars a year, about 1.8 times the global product.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. More than per cent from plants.
Step 1. (a) drugs, at least.
Step 2. (b) drugs, at most.
Step 3. (c) drugs, at least.
Answer: ; ; .
Check. The share from plants is more than per cent, so the least number uses per cent, and the greatest number of the others uses the remainder.
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