The average of a b and c is 11 average of cd is 17 average of emf is 20 and average of a and c is 17 find out the average of a b c d e f
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According to the question
A + b + c = 11 x 3 = 33 .. ...(1)
C + d + e = 17 x 3 = 51 ......(2)
E + f = 22 x 2 = 44 .......(3)
E + c = 17 x 2 = 34 .... (4)
From the equations 2 and 4 we get
34 + d = 51 or d = 17
Now by adding equations 1, 3 and 5, we get
A + b + c + d + e + f = 33 + 44 + 17 = 94
Average of a,b,c,d,e and f = 94/6
= 47/3 = 15(2/3)
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