1.

If the mean of a,b,c,d is K, then what is the mean of a) a+b,2b,c+b, d+b

Answer»

Answer:

mean of a, B, c, d=(a+b+c+d)/4=K

mean of a+b,2b,c+b,d+b

=(a+b+2b+c+b+d+b)/4

=(a+b+c+d+4b)/4

=(a+b+c+d)/4. + 4b/4

=K+b

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