In a population of 200, a sample of 40 is to be selected. If the first participant is the first person, what is the number of the 40th person?

To find the number of the 40th person, we need to determine the position of the 40th person in the population.

Since the first participant is the first person, we can assume that the first participant is numbered 1.

To find the position of the 40th person, we can use the formula:

Position of nth person = Position of (n-1)th person + 1

Therefore, the position of the 40th person would be:

Position of 40th person = Position of 39th person + 1
Position of 40th person = Position of 38th person + 1 + 1
...
Position of 40th person = Position of 1st person + 39

Since the first participant is numbered 1, the position of the 40th person would be 1 + 39 = 40.

Therefore, the number of the 40th person in the population of 200 would be 40.

40