Question

the mean of five no. is27 .ifone no is added then the mean is26 find the added no.​

Answer 1

Answer:

I am sorry I dont know

Answer 2

$let \: five \: numbers \: be \: a \: b \: c \: d \: e \\ \ mean = \frac{sum \: of \: observation}{no. \: of \: observation} \\ 27= \frac{a + b + c + d + e}{5} \\ a + b + c + d + e = 135 \\ let \: added \: no. \: be \: x \\ \ \frac{135 + x}{6} = 26 \\ x + 135 = 156 \\ x = 21$

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