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If the arithmetic mean of the numbers x1,x2,x3,…,xk is x¯ , then the arithmetic mean of the numbers ax1+b,ax2+b,ax3+b..........axn+b,where a,b are two constants, would be
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a
x
b
nax+nb
c
ax
d
ax+b
answer is D.
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Detailed Solution
Required mean is ax1+b+ax2+b+⋯+axn+bn =ax1+x2+⋯+xnn+b=ax¯+b ∵x1+x2+⋯+xnn=x¯
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