The Probability Density for an Electron That Has Passed Through

Multiple Choice

The probability density for an electron that has passed through an experimental apparatus is shown in the figure.If 4100 electrons pass through the apparatus,what is the expected number that will land in a 0.10 mm-wide strip centered at x = 0.00 mm?

A) 140
B) 1400
C) 450
D) 45