Question

the mean of the observation 10,11,15,28,20and a is 17 ,find the value of a​

Answer 1

Answer:

a = 18

Step-by-step explanation:

Mean = Sum of all observations / Total number of observations

According to Question,

(10+11+15+28+20+a) / 6 = 17

=> 84+a = 17×6

=> 84+a = 102

=> a = 102-84

=> a = 18

Answer 2

Answer:

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Step-by-step explanation:

$10 + 11 + 15 + 2 + 8 + 20 + a \div 7 = 17$

a+84=119

a=35