Question

В каждой пятой банке кофе,согласно условиям акции,есть приз.Призы распределены по банкам случайно.Галя покупает банку кофе в надежде выиграть приз. Найдите вероятность того,что галя не найдет приз в своей банке.

Answer 1

Вероятность выиграть приз равна 1/5=0,2
Следовательно, вероятность проигрыша равна  1-0,2=0,8  (или 80%)
Ответ: Вероятность не найти приз в купленной Галей банке кофе равна 80%

Answer 2

Probability of not finding a prize in Galia's coffee can

To find the probability that Galia does not find a prize in her coffee can, we need to consider the total number of cans and the number of cans with prizes.

According to the conditions of the promotion, every fifth coffee can contains a prize, and the distribution of prizes is random. Therefore, the probability of finding a prize in any given coffee can is 1/5.

Let's denote the event of Galia finding a prize in her coffee can as A, and the event of Galia not finding a prize as A'. We want to find the probability of A'.

Since the distribution of prizes is random, the probability of not finding a prize in Galia's coffee can is the complement of finding a prize, which is 1 - 1/5 = 4/5.

Therefore, the probability that Galia does not find a prize in her coffee can is 4/5.