Question

Подскажите, пожалуйста!!! Известно, что 80% выпускаемых мобильных телефонов имеют доступ к сети Интернет, а 70% — имеют сенсорный экран. Вероятность того, что наугад выбранный телефон с сенсорным экраном будет иметь доступ к сети Интернет, равна 96%. Найдите вероятность того, что наугад выбранный телефон с доступом в Интернет будет иметь сенсорный экран.

Answer 1

Ответ:

0, 84

Объяснение: P( B/A) =0, 96*0, 7/0.8=0, 84

Answer 2

Probability Calculation

To find the probability of a randomly selected phone with internet access also having a touchscreen, we can use the formula for conditional probability:

P(A|B) = P(A ∩ B) / P(B)

Where: - P(A|B) is the probability of having a touchscreen given internet access. - P(A ∩ B) is the probability of having both a touchscreen and internet access. - P(B) is the probability of having internet access.

Given: - P(internet access) = 80% = 0.80 - P(touchscreen) = 70% = 0.70 - P(touchscreen | internet access) = 96% = 0.96

We can calculate the probability of a phone with internet access also having a touchscreen using the provided information.

Calculation

Using the formula: P(touchscreen | internet access) = P(touchscreen ∩ internet access) / P(internet access)

We have: P(touchscreen | internet access) = 0.96 = P(touchscreen ∩ internet access) / 0.80

Solving for P(touchscreen ∩ internet access): P(touchscreen ∩ internet access) = 0.96 * 0.80 = 0.768

Result

Therefore, the probability of a randomly selected phone with internet access also having a touchscreen is 76.8%.