just wanted to check answers, thank you

The following contingency table summarizes the drug test results for 453 test takers: Positive Negative Total Doesn't use drugs 10 184 194 Uses drugs 244 15 259 Total 254 199 443 For a randomly selected test administration, find the following probabilities. (Round the answers to 4 decimal places.) 1) The probability that the test result is positive: 0.5734 2) The probability of a true negative: 0.4153 3) The probability of an error: 0:0339 4) The negative predicting value: 0.9246