In a country of 1400 million population, 70% own mobile phones. Among the mobile phone owners, only 294 million access the Internet. Among these Internet users, only half buy goods from e-commerce portals. What is the percentage of these buyers in the country?

Population and Mobile Phone Ownership

The problem starts by giving us the total population of a country, which is 1400 million people. It also states that 70% of this population owns mobile phones. To find the number of mobile phone owners, we calculate 70% of the total population:

Number of Mobile Owners = Total Population $\times$ Percentage of Mobile Owners

Number of Mobile Owners = $1400\text{ million}\times 70\%=1400\times \frac{70}{100}=1400\times 0.70=980\text{ million}$.

So, 980 million people in the country own mobile phones.

Internet Users Calculation

Next, the question tells us that among the mobile phone owners, 294 million access the Internet. This means the number of people using the internet is directly provided:

Number of Internet Users = 294 million.

E-commerce Buyers Determination

We are given that only half of the people who use the Internet purchase goods from e-commerce portals. To find the number of these buyers, we divide the number of Internet users by 2:

Number of E-commerce Buyers = Number of Internet Users / 2

Number of E-commerce Buyers = $294\text{ million}/2=147\text{ million}$.

Thus, 147 million people buy goods from e-commerce portals.

Final Percentage Calculation

The final step is to calculate what percentage of the total country population these e-commerce buyers represent. We use the number of e-commerce buyers and the total population for this calculation:

Percentage of Buyers = (Number of E-commerce Buyers / Total Population) $\times 100$

Percentage of Buyers = $(147\text{ million}/1400\text{ million})\times 100$

Percentage of Buyers = $(\frac{147}{1400})\times 100$

Percentage of Buyers = $0.105\times 100=10.50\%$.

Therefore, 10.50% of the country's total population buys goods from e-commerce portals.