1.

The mean of the number 6, ‘y’, 7, ‘x’ and 14 is 8. Express ‘y’ in terms of ‘x’.

Answer»

No. of terms = 5 and mean = 8 

Sum of numbers = 5 x 8 = 40 ..(i) 

but sum of numbers = 6+y+7+x+14 = 27+y+x .(ii) 

from (i) and (ii) 

27 + y + x = 40 

x + y = 13 

y = 13 – x



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