Question
Show that line joining $(4,-1)$ and $(6,0)$ is parallel to line joining $(7,-2)$ and $(5,-3)$.
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If the mean of the following distribution is 27, find the value of p.
|
Class
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
|
Frequency
|
8
|
p
|
12
|
13
|
10
|