Question

if the average mean of 8,12 , 15,21 , x,and 11 is 17 then what is x ?
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Answer 1

Answer:

x=45

Step-by-step explanation:

(8+12+15+21+x+11)/6=17

(67+x)/6= 17

67+x = 17*6

67+x= 112

x= 112-67= 45 Ans

Answer 2

Answer:

55

Step-by-step explanation:

For answering this u must know the mean formula that is - sum of given term / total number of terms

so sum of= 8+12+15+21+X+11= 67+X

Now mean - as given = 17. equation 1

so as I told the formula =( 67+x)/6. equation 2

now taking both the equation

67+X/6=17

which gives 67+X = 17×6

which gives 67+X = 102

which gives X= 102-67= 55