The mean of 25 observation is 36. Out of these observation if the mean of first 13 observation is 40. Find the sum of remaining 12 observation.
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25×36=900
13×40=520
900-520=380
380 is the answer of this sum
13×40=520
900-520=380
380 is the answer of this sum
Revati21:
Is it surely correct??
yes absolutely
Okay! Thanks alot.
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