A study of 120,000 randomly selected photos posted to a social media site determined that 4% were "selfies," photos of oneself. If the percent of selfies is consistent throughout the rest of the photos on the site, and there are 20 billion photos, how many billions of photos on the site are selfies?

Question

A study of 120,000 randomly selected photos posted to a social media site determined that  4% were "selfies," photos of oneself. If the percent of selfies is consistent throughout the rest of the photos on the site, and there are 20 billion photos, how many billions of photos on the site are selfies?

Bytelearn · Accepted Answer

Calculate Percentage of Selfies: Determine the percentage of selfies among the photos. We know that 4% of the 120,000 randomly selected photos were selfies. This percentage is assumed to be consistent across all photos on the site.Calculate Number of Selfies: Calculate the number of selfies in the entire collection of photos. Since there are 20 billion photos on the site, we need to find 4% of 20 billion to determine how many are selfies. 4% of 20 billion = 0.04 * 20,000,000,000Perform Calculation: Perform the calculation to find the number of selfies. 0.04 * 20,000,000,000 = 800,000,000Convert to Billions: Convert the number of selfies to billions. Since the question asks for the answer in billions, we need to express 800,000,000 as billions. 800,000,000 photos = 0.8 billion photos

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