Question

URGENT HAI, PLEASE SOLVE KAR DO KOI

Answer 1

Answer:

mean of five observation

=x+x+2+x+4+x+6+x+8/5=11

=5x+20/5=11

=5(x+4)/5=11

=x+4=11

=x=7

so the no. are 7,7+2=9,7+4=11,7+6=13,7+8=15.

mean of 1st three observation is

=7+9+11/3

=27/3=9ans.

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