Algebra 9th std
please help and show working or explanation (see attachment) answer is marked but how the answer came I want explanation or working
please help and show working or explanation (see attachment) answer is marked but how the answer came I want explanation or working
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= (x1+x2+....+xn + y1+y2+...+yn)/(n+n)
= (x1+x2+....+xn + y1+y2+...+yn)/(2n)
=(1/2) (x1+x2+....+xn + y1+y2+...+yn)/(n)
= (1/2)((x1+x2+....+xn)/n + (y1+y2+...+yn)/n)
= (1/2)(x'+y' )