Question

На фабрике 990 качественных изделий приходится десять некачественных.Какова вероятность того,что случайно взятое изделие будет некачественным?

Answer 1

$P(A)= \frac{10}{990+10}= \frac{1}{1000}=0,001$  (0,1%) -искомая вероятность

Answer 2

Calculating the Probability of Selecting a Defective Item

To calculate the probability of selecting a defective item from the factory, we can use the formula for probability:

Probability = (Number of defective items) / (Total number of items)

In this case, we are given that on the factory, 10 defective items are produced for every 990 high-quality items. Using this information, we can calculate the probability of selecting a defective item.

The probability of selecting a defective item can be calculated as follows:

Probability = 10 / (990 + 10)

Let's calculate this probability.