If mean of 5 observations x , x+2 , x+4 , x+6 , x+8 is 11. Find the median of first three observations.
Answers
Answered by
503
it's 9
(x+x+2+x+4+x+6+x+8)/5=11
5x+20= 55
x+4=11
x=7
now,( 7+9+11)/3= 9
(x+x+2+x+4+x+6+x+8)/5=11
5x+20= 55
x+4=11
x=7
now,( 7+9+11)/3= 9
Answered by
279
(x+x+2+x+4+x+6+x+8)÷5=11
(5x+20)÷5=11
5x+20=55
5x=35
X=7
First observation=x=7
Second observation=x+2=7+2=9
Third observation=x+4=7+4=11
I.e their ascending order is 7,9,11.
n=3
(n+1)÷2=(3+1)÷2
=4/2
=2
I.e second observation
I.e median is 9
(5x+20)÷5=11
5x+20=55
5x=35
X=7
First observation=x=7
Second observation=x+2=7+2=9
Third observation=x+4=7+4=11
I.e their ascending order is 7,9,11.
n=3
(n+1)÷2=(3+1)÷2
=4/2
=2
I.e second observation
I.e median is 9
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