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  1. If x : y = 3 : 4 and y : z = 3 : 4,
    then
    x + y + z
    		is equal to
    3z
    1. 13
      27
    2. 1
      2
    3. 73
      84
    4. 37
      48
Correct Option: D

x : y = 3 : 4 = 9 : 12
y : z = 3 : 4 = 12 : 16
∴  x : y : z = 9 : 12 : 16

∴ 
x + y + z
 =
9k + 12k + 16k
3z3 × 16k

=
37
48


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