| Tag | Value |
|---|---|
| file | Probability_uva-elementary-probability-1002-en_uva-elementary-probability-1002-en |
| name | uva-elementary-probability-1002-en |
| section | Probability/Elementary Probability |
| type | schoice |
| solution | FALSE, FALSE, TRUE, FALSE |
| Type | Conceptual |
| Language | English |
| Level | Statistical Literacy |
| IRT-Difficulty | 1.751 |
| p-value | 0.8329 |
There are 60 screws in a box. One of these screws has both a defective head and a defective thread. Three of the screws have a defective head and two have a defective thread. We call the events:‛
* A = {a defective thread}
* B = {a defective head}.
* C = {both a defective head and a defective wire}. What then is the relative frequency of B?