The time taken by 60 students is to answer a probability question recorded as given in the table elow. Time (minutes) 1 2 4 6 7 Frequency (number 4 21 18 10 4 of students) Find the mean, median and standard deviation of the time taken by the students in answering the questions. Mean = 3.7667 Median = 3.6667 Standard Deviation = 1.2125

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