In a math class with 20 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 15 students who completed
the assignment. There were 9 students who passed the test and also completed the
assignment. What is the probability that a student chosen randomly from the class
failed the test and did not complete the homework?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.