If the mean of five observation is x, x+2, x+4,x+6,x+8 is 11 then write the value of x
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Given:
Let a1 = x , a2 = x+2 , a3 = x+4 , a4 = x+6 ,
a5 = x+8
Mean of a1,a2,a3,a4,a5 is 11.
Step-by-step explanation:
Mean = a1 + a2 + a3 + a4 + a5 ÷ 5
11 = x + x+2 + x+4 + x+6 + x+8 ÷ 5
5x + 20 ÷ 5 = 11
5(x + 4) ÷ 5 = 11
Therefore, x + 4 = 11
x = 11 - 4
x = 7
Answer : The value of x is 7.
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