At a conference for 250 people, 40% of the participants are French, 45% are Americans, 10% are Germans, and the rest are of other nationalities. How many French participants are at the conference? 150

130

120

100

The number of French participants at the conference can be calculated as 40% of the total number of participants (250) which is 0.4 x 250 = 100 French participants.

So the correct answer is 100.