Оля прочитала книгу за три дня. в первый день она прочитала 60 страниц, что составило 15% всей книги, во второй день-25% всей книги, а остальное- в третий день. сколько страниц оля прочитала во второй день; в третий день?

1although the content and character of economics cannot be described briefly, numerous writers have attempted that. 2 an especially useless, though once popular, example is: «economics is what economists do.»3 notable economist of the last century alfred marshall called economics «a study of mankind in the ordinary business of life.» 4 we may make better progress by comparing economics with other subjects. like every other discipline that attempts to explain observed facts (e.g., physics, astronomy, meteorology), economics comprises a vast collection of descriptive material organized around a central core of theoretical principles. the manner in which theoretical principles are formulated and used in applications varies greatly from one science to another. like psychology, economics draws much of its theoretical core from intuition, casual observation, and «common knowledge about human nature.» like astronomy, economics is largely nonexperimental. like meteorology, economics is relatively inexact, as is weather forecasting. like particle physics and molecular biology, economics deals with an array of closely interrelated phenomena (as do sociology and social psychology). like such disciplines as art, fantasy writing, mathematics, metaphysics, cosmology, and the like, economics attracts different people for different reasons: «one person’s meat is another person’s poison.» though all disciplines differ, all are remarkably similar in one respect: all are meant to convey an interesting, persuasive, and intellectually satisfying story about selected aspects of experience. as einstein once put it: «science is the attempt to make the chaotic diversity of our sense-experience correspond to a logically uniform system of thought.»

число страниц всей книги = 60/15*100=400

на второй день  400*25/100=100 страниц

на третий день 400-60-100=240 страниц

Доверять другим легче,а заслужить доверие к себе не так просто.

Точный вопрос какой?