Respuesta :

kritika3375

Answer:

fourth number = 13

Step-by-step explanation:

(7 + 9 + 11 + N)/4 = 10

7 + 9 + 11 + N = 40

N + 27 = 40

N = 13

fichoh

The fourth number in other to obtain a mean value of 10 is 13

Given 3 numbers : 9, 11, 7

Mean value = 10

Let the fourth number be m

Recall :

Mean = ΣX/ n

Mean = (9 + 11 + 7 + m) / 4 = 10

(27 + m) / 4 = 10

27 + m = 40

m = 40 - 27

m = 13

Hence, the fourth term number is 13

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