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Q.

The mean and the median of the following ten numbers in increasing  order 10,22,26,29,34, x ,42,67,70, y are 42 and 35 respectively, then y/x  is equal to:

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a

7/2

b

7/3

c

8/3

d

9/4

answer is D.

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Detailed Solution

Ten numbers in increasing order are 10, 22,  26, 34, ,x , 42, 67, 70, y  mean =
∑Xin=x+y+30010=42 ⇒x+y=120 
median =T5+T62=35⇒34+x2=35⇒x=36 ⇒y=84

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The mean and the median of the following ten numbers in increasing  order 10,22,26,29,34, x ,42,67,70, y are 42 and 35 respectively, then y/x  is equal to: