Self
Maths Puzzle
Numerical Ability
Q. Average of three numbers are a,b and c is 180. Also, b is 2a and C is 2.4a. What is the new average if a number 'd', which is three fourth of C, is introduced?
Read Solution (Total 5)
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- ans= 180
a+b+c=180*3
a+2a+2.4a=180*3
a(1+2+2.4)=180*3
a(5.4)=180*3
a=100
d=3/4c=3/4(2.4a)=1.8*100=180
(a+b+c+d)/4= (180*3+180)/4=180 ans... - 10 years agoHelpfull: Yes(3) No(0)
- 3*(a+2a+2.4a)=180
a=100
b=200
c=240
d=180
new average = (100 + 200 + 240 + 180)/4 = 180 - 10 years agoHelpfull: Yes(1) No(0)
- sorry
in first line
(a+2a+2.4a)=180*3 - 10 years agoHelpfull: Yes(1) No(0)
- 180
a+2a+2.4a= 180*3
5.4a=540
a=100
b=200
c=240
d= (3/4)*240
avg=(100+200+240+180)/4=180 - 10 years agoHelpfull: Yes(0) No(0)
- a+2a+2.4a=540
a=100,b=200,c=240
d=3*240/4=180
new avg=100+200+240+180/4=180 - 10 years agoHelpfull: Yes(0) No(0)
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