The
mean of
of 49 Observation Is 17. If the mean of First 25 observation
is 16.4. Find the
17.2 and
that of
last 25 observation
25th Observation. .
is
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Step-by-step explanation:
Mean of 11 observations =50
Mean of first 6 =49
Last 6 =52
Total sum of observation =50×11=550
Total observation of first 6 =49×6
=294
Total observation of last 6 =52×6
=312
Sixth observation =294+312−550
=606−550
=56
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