it is from statistics and probability. solve it clearly.

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Q : A student has scored 88% in home assignments, 97% in midterm examination and 98% in the final examination of probability and statistics course. If the respective points are 25, 25 and 50, what then is the overall percentage of the student in the course? Q: Five group of students that consist of 10, 8, 11, 13 and 9 individuals. They consumed the mean average time in computer programming were 18, 33, 11, 42 and 53 hours respectively. Find the overall average time consuming the student groups in computer programming. Q: Trained rats were released in a maze. A sample of ten rates to escape time (in seconds) was: 100, 38, N. 122, 95, 116, 56, 135, 104, N Can you calculate the mean average of the sample data set? Explain Is the median average a meaningful measure of central tendency for the data set? Explain

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