Question

if the mean of n observation is 5 and sum of observation is 25, then find n

Answer 1

Answer:

mean = sum of observations/ number of observations

5 = 25/n

n = 25/5

n = 5

Answer 2

$\sf{mean \: of \: observations = \frac{sum \: of \: all \: observations}{no.of \: observations} }$

$\tt{5 = \frac{25}{n} }$

$\mathfrak{n = \frac{ \cancel{25} ^{ \: \: 5} }{ \cancel{5}} }$

$\mathfrak{so \: n = 5}$

#Hope you Understood

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