214 Marks 17738 Marks
A group of students were given a spelling test.
The table shows their marks
Mark
Frequency
6
5
a) Work out the range of the marks.
7
4.
8
b) How many students are in the group?
9
10
c) Work out the mean mark of the group.
10
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Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.