The mean of 10 numbers is 12?5
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Answer:
ANSWER
The sum of firs 6 numbers is
=15×6
=90
Therefore
x
1
+x
2
+...x
6
=90 ...(i)
And
The sum of last five number is
=10×5
=50
Therefore
x
10
+x
9
+x
8
...x
6
=50 ...(ii)
Sum of all number is
=12.5×10
=125 ...(iii)
Hence
i+ii
=140
=(x
1
+x
2
+....x
10)
+x
6
=125+x
6
Or
x
6
=15.
Step-by-step explanation:
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