1. The following table shows the distribution of grades obtained by 50 students grades 1 2 3 4 5 6 7 frequency 1 3 7 13 11 10 5 One student is chosen randomly from the group a) Find the probability that the chosen student has a grade of 5 and higher. A second student is chosen randomly from the group b) Given that the first chosen student got a grade of 5 or higher, find the probability that both students had obtained a grade of 6.
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- From the table, we can see that there are 20 students who obtained a grade of 5 and higher out of a total of 50 students. - Therefore, the probability of choosing a student with a grade of 5 and higher is 20/50 = 0.4 or 40%. Show more…
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