After an employer has narrowed down résumés, they usually bring in 10 or fewer applicants to interview.

If your question is whether this is true - this is true! Actually 10 applicants are rather rare- it's more common to invite around 5.

The reason for this is that it costs time (and therefore money) to interview the applicants, so the employers want to limit this cost.

Louis xvi wanted to force aristocrats to pay taxes for the first time