Respuesta :

devishri1977

Answer:

16

Step-by-step explanation:

Let the third number = x

Average = 19

[tex]\dfrac{17+24+x }{3}=19\\41 + x = 19*3\\\\\\[/tex]

41 + x = 57

      x = 57 - 41

x = 16

sg9972713

Average of 15 numbers = 18

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152Average of last 8 numbers =17

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152Average of last 8 numbers =17Sum of last 8 numbers =17×8 =136

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152Average of last 8 numbers =17Sum of last 8 numbers =17×8 =1368th number = Sum of first 8 +Sum of last 8 - total sum

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152Average of last 8 numbers =17Sum of last 8 numbers =17×8 =1368th number = Sum of first 8 +Sum of last 8 - total sum=152+136−270

Average of 15 numbers = 18Sum of 15 numbers = 15×18 = 270Average of first 8 numbers =19Sum of first 8 numbers = 19×8 =152Average of last 8 numbers =17Sum of last 8 numbers =17×8 =1368th number = Sum of first 8 +Sum of last 8 - total sum=152+136−270=18

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