Question

В магазине в среднем на каждые 80 качественных наручных часов приходится 12 с дефектаии. Какова вероятность того,что наудачу купленные в этом магазине часы окажутся качественными? Ответ округдите до сотых

Answer 1

80+12=92. 80:92=0.87

Answer 2

Calculation of the Probability

To calculate the probability that randomly purchased watches from this store will be of good quality, we can use the information provided. According to the given information, for every 80 high-quality watches, there are 12 with defects.

To find the probability of randomly purchasing a good quality watch, we can subtract the probability of purchasing a defective watch from 1.

Let's calculate it step by step:

1. Calculate the total number of watches: 80 + 12 = 92. 2. Calculate the probability of purchasing a defective watch: 12 / 92 = 0.1304. 3. Subtract the probability of purchasing a defective watch from 1: 1 - 0.1304 = 0.8696.

Therefore, the probability that randomly purchased watches from this store will be of good quality is approximately 0.87 when rounded to the hundredths place.

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