2010013606

SubArea: 
Probability
Level: 
A
Project ID: 
2010013606
Source Problem: 
1003029202
Accepted: 
0
Clonable: 
1
Easy: 
0
In a set of \( 200 \) items, \( 20 \) are defective. We pick randomly \( 10 \) items from this set. First nine items were not defective. Find the probability that the tenth item selected is not defective too. Results are rounded to three decimal places.
\( \frac{171}{191}\doteq 0.895 \)
\( \frac{180}{191}\doteq 0.942 \)
\( \frac{180}{200}\doteq 0.9\)
\( \frac{1}{171}\doteq 0.006 \)