Question
The average of 8 numbers is 5.95. The average of two of
them is 5.4, while the average of the other two is 5.86. the average of the remaining four numbers isSolution
Let the eight numbers be a, b, c, d, e, f, g, h According to the question, (a+b+c+d+e+f+g+h)/8 = 5.95 a + b + c + d + e + f + g + h = 47.6 ……………. (i) (a+b)/2 = 5.4 a + b = 10.8 ……. (ii) (c +d)/2 = 5.86 c + d = 11.72 …… (iii) put the value of eq (ii) and (iii) in (i) e + f + g + h = 47.6 – 10.8 – 11.72 = 25.08 Average = 25.08/4 = 6.27
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