If x1+x2+x3+x4=56 find
a the mean of x1+3,x2+3,x3+3,x4+3
b the mean of x1+x2+x3+x4
c the mean of 2x1+2x2+2x3+3x4
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Step-by-step explanation:
.................,,,,,,,
a=17,b=14,c=28
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