Question

if the averge arithmatic mean of 8,12,15,21,x and 11 is 17 then what is x ?​

Answer 1

Answer:

#Arithmetic Mean = Sum of observations / Number of observations

#8+12+15+21+x+11/6 = 17

67+x = 17×6

67+x = 102

x = 102-67

x = 35

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Answer 2

Answer:

Hey mate, Good morning ❤

#Here's ur answer..☆☆☆

Step-by-step explanation:

$\huge{ \boxed{ \mathfrak{ \pink{answer...}}}}$

$\bold{you \: must \: know....} \\ \bold{ \red{ \boxed{arithmetic \: mean = \frac{sum \: of \: all \: observtions}{no. \: of \: observations}}}}$

$\bold{given \: = > \frac{8 + 12 + 15 + 21 + x + 11}{6} = 17 }\\ = > \frac{67 + x }{6} = 17 \\ = > 67 + x = 102 \\ = > x = 102 - 67 \\ \green{ \bold{= > x = 35}} (\blue{answer..})$

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