Question

a student asked to find the arthmetic mean of the number 3,11,7,9,15,13,8,19,17,21,14 and x. he found the mean be 12. what should be the number in place of x​

Answer 1

Answer:

The answer is 7.

Answer 2

Answer:

Arithmetic mean = sum of the terms/total number of terms.

here Arithmetic mean = 12.

(137 + x)/12 = 12

137 + x = 144

x = 144-137 = 7

x = 7

Step-by-step explanation:

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