Question

find the mean of the following datas 5,10,15,20,25,30,35 also find the median also

Answer 1

Mean of 5,10,15,20,25,30
$mean = \frac{sum \: of \: given \: observations}{no \: of \: given \: observation} \\ = \frac{5 + 10 + 15 + 20 + 25 + 30 + 35}{7} \\ = \frac{140}{7} \\ = 20$
$median = value \: of \: \frac{1}{2} .(n + 1)th \: observation \\ = \frac{1}{2} (7 + 1) \\ \frac{1}{2} \times 8 = 4th \: observation \\ median = 20$

Answer 2

Mean=20
Median=20
Mode=20