Question

of the 500,000 sat examinations that come into a testing center grading site, 500,000 exams are checked for errors only on the math section, and 50,000 are checked thoroughly (both the english and the math section). what is the probability that it will be checked for errors only on the math section?

Answer 1

The probability that an SAT exam will be checked for errors only on the math section is 0.9 or 90%, calculated by dividing the number of math-only checked exams (450,000) by the total number of exams (500,000).

Step-by-step explanation:

The probability that an exam will be checked for errors only on the math section can be found by calculating the ratio of the number of math-only checks to the total number of exams. Given that there are 500,000 exams in total and all of them are checked for errors only on the math section while 50,000 are checked thoroughly (both English and math sections), we subtract the thoroughly checked exams from the total to find the exams checked only for math.

Math-only checked exams = Total exams - Thoroughly checked exams = 500,000 - 50,000 = 450,000

Probability = Math-only checked exams / Total exams = 450,000 / 500,000

Probability = 0.9 or 90%

Hence, the probability that an exam will be checked for errors only on the math section is 0.9 or 90%.