Пара сил  - це рівні за модулем і напрямлені в одну сторону сили.

It is applied when the probability of success are not the same from trial to trial.

The normal curve is asymptotic.

It is a perfectly symmetric, mound-shaped distribution.

Five hundred raffle tickets are sold at ₱25 each for three prizes of ₱4,000, ₱2,500, and ₱1,000. After each prize drawing, the winner ticket is then returned to the collection of tickets. What is the mean or expected value if a person purchases four tickets?

x

₱3,900

₱2,400

₱900

-₱100

P(x)

4/500

4/500

4/500

496/500

The most common way to measure the spread of a normal distribution.