Question

Родион раскольников покупает себе топор. У первых трёх торговцев по 15 топоров с сосновыми топорищами и по 10 топоров с дубовыми. имеются ещё два торговца, у каждого из которых по 5 топоров с сосновыми топорищами и по 5 топоров с дубовыми.Раскольников покупает первый попавшийся топор наугад у выбранного торговца.Какова вероятность покупки топора с дубовым топорищем?кто силён в математике, помогите

Answer 1

Количество всех топоров:15*3+10*3+2*5+2*5=95 шт
Количество дубовых топоров:30+10=40 шт
Вероятность=40/95=0,5
Ответ:0,5

Answer 2

To calculate the probability of purchasing a hatchet with an oak handle, we need to consider the total number of hatchets available and the number of hatchets with oak handles.

Let's break down the information provided:

- The first three merchants each have 15 hatchets with pine handles and 10 hatchets with oak handles. - There are two additional merchants, each with 5 hatchets with pine handles and 5 hatchets with oak handles.

To calculate the probability, we need to determine the total number of hatchets available and the number of hatchets with oak handles.

Total number of hatchets: - The first three merchants have a total of 15 + 15 + 15 = 45 hatchets with pine handles. - The first three merchants have a total of 10 + 10 + 10 = 30 hatchets with oak handles. - The two additional merchants have a total of 5 + 5 = 10 hatchets with pine handles. - The two additional merchants have a total of 5 + 5 = 10 hatchets with oak handles.

Therefore, the total number of hatchets available is 45 + 30 + 10 + 10 = 95.

Number of hatchets with oak handles: - The first three merchants have a total of 10 + 10 + 10 = 30 hatchets with oak handles. - The two additional merchants have a total of 5 + 5 = 10 hatchets with oak handles.

Therefore, the total number of hatchets with oak handles is 30 + 10 = 40.

To calculate the probability, we divide the number of hatchets with oak handles by the total number of hatchets:

Probability = Number of hatchets with oak handles / Total number of hatchets Probability = 40 / 95

Simplifying the fraction, we get:

Probability = 8 / 19

Therefore, the probability of purchasing a hatchet with an oak handle is 8/19.

Please note that this calculation assumes that the hatchet purchased is chosen randomly from the available options.