Question:The mean temperature of Monday to Wednesday was `37∘C and of Tuesday to Thursday was `34∘C.If the temperature on Thursday was `4/5 th`that of Monday ,the temperature on Thursday was: 

A `36.5^0 C` 
B `36^0 C`` 
C `35.^0 C` 
D `34^0 C` 

+ Answer
B 

+ Explanation
M + T +  W

`= (3 xx 37)`

`= 111, T + W + Th`

`= (3 xx 34)`

`= 102`

`Now ,Th = 4/5 M ⇒ M = 5/4 Th`.

(M + T + W) - (T + W + Th)

`= 9 ⇒ M - Th = 9

`⇒ (5/4 Th - Th = 9)`

`or Th = 36`

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Irin Moni

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