A) 4.5
B) 5
C) 2
D) 4
Correct Answer: C
Solution :
Let the numbers be a, b, c \[\frac{a+b+c}{3}=3d\] \[\Rightarrow \] \[a+b+c=9d\] Again, \[\frac{a+b+c+d}{4}=5\] \[\Rightarrow \] \[a+b+c+d=20\] \[\Rightarrow \] \[9d+d=20\] \[\Rightarrow \] \[10d=20\] \[\Rightarrow \] \[d=2\]You need to login to perform this action.
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