Of the world's population of 7.5 billion people, are scraping by on incomes that average less than $2 per day.

260 million
1.1 billion
5 billion
6.2 billion

1.1 billion? According to unicef 3 billion earn less than $2.50 so this seems like the appropriate answer.

The advantage of administering personality tests on employees is that it will allow the employer to know the mindset and personality of the employee. this will allow the employer to at least have an idea as to how the employee works and how his attitude in the workplace. the disadvantage is that it may make the employee a little anxious as to whether he would meet the personality requirements of the employer and whether he would be able to retain the job or not.