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a)
range:
A group of students were given a spelling test.
The table shows their marks
Mark
Frequency
b)
+
stud
6
5
a) Work out the range of the marks.
o)
7
4
mean:
8.
7
b) How many students are in the group?
9
10
10
4.
c) Work out the mean mark of the group.

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?