The phrase "a number of developing countries" is correct and usable in written English.
It can be used when referring to several countries that are in the process of development, often in discussions about economics, politics, or social issues.
Example: "A number of developing countries are seeking international aid to improve their infrastructure and education systems."
Alternatives: "several developing nations" or "many emerging economies".
Also the availability of clean water is an issue that has paralleled the continual increase in water consumption due to both global population growth and the economic development in a number of developing countries.
A number of developing countries are undertaking projects pertaining to the design and development of space technology, either using their own resources or in collaboration with foreign countries, on a regional or international basis.
After World War II a number of developing countries attained independence from their former colonial rulers.
A number of developing countries have set up social benefits, whether conditional or unconditional, that help poor households.
"A number of developing countries – take Kenya, for example – have got serious export industries who sell to the UK," Winters said.
Vietnam, like a number of developing countries that have overseen considerable progress, has a strong authoritarian streak, recently jailing a French-Vietnamese blogger.
Predictors of health workers' prescribing practice have been explored in a number of developing country settings [18] [22] where patient (age, complaint), consultation (time of day, duration), and health worker (level of training) factors have been identified as influencing decisions in prescribing antimalarials.
From the 1980s, a number of developed countries witnessed extensive privatizations of state-owned enterprises, whether in parts or in full (examples range from airlines to the telecom sector), although public ownership continues to be a widespread feature for example, in the field of local public transport.
In 2005, after the popping of the dot-com bubble, the Bank of England looked at a number of developed countries and concluded that a 0.6 per cent effect for financial assets was about right, but found that the impact changes in house prices were harder to estimate.
Similar programs have also been recently implemented in a number of developed countries.
A multiplicity of plant based extracts are currently approved for use in a number of developed countries.
