how it can be solved.......

Answers
Answer:
(i) 96
(ii) k=13
Step-by-step explanation:
mean of 8 numbers=12
sum of known 5 numbers=6+8+5+10+28=57
let each unknown number be k.
then, sum of unknown 3 numbers=k+k+k=3k
mean=sum of all observations÷no. of observations
or, 12=(57+3k)÷8
or, 57+3k=96
or, 3k=96-57=39
or, k=39÷3=13
k=13
Also,
sum of all the numbers=57+(3×13)=57+39=96
WELL, REALLY HOPE THAT HELPS!
(i) Mean of number = 12
Total observation = 8
Sum of Total observation = 8 × 12 = 96
Given Observation are 6, 8, 5, 10 and 28
The remaining observation are k, k and k,
mean = (5 + 6 + 8 + 10 + 28 + k + k + k)/8
⇒ 12 = (57 + 3k)/8
⇒ 12 × 8 = 57 + 3k
⇒ 96 = 57 + 3k
⇒ 96 - 57 = 3k
⇒ 39/3 = k
⇒ k = 13
Sum of 8 numbers = 5 + 6 + 8 + 10 + 13 + 13 + 13 + 28 = 96.
(ii) The value of K = 13
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