2
Реши задачи.
и на
Сравни условия и решения задач
а) Отряд волонтеров состоит из 450 человек.
3
5 из них
школьники. Сколько школьников в отряде?
6) В отряде волонтеров 270 школьников, что составе
от общего количества. Сколько всего человек в отряде
3
Вычисли.

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

What is the domain of the step function f(x)=[2x]-1?