- 27
- 45
- 150
- 270
- d
-
Sum of Observations=x
No of Observations=06
Mean=Sum of Observations / No of Observations
Mean=x/6
45=x/6
45*6=x
270=x
- 200 gms
- 500 gms
- 1 Kg
- 1 Ton
- C
-
1 Kg=1000 g
Amount of Iron in mixture=20% of Sand
20/100*1000=200 g
Amount of Sand=1000-200=800g
Let the sand added “x”
Iron=10/100(1000+x)
200=1/10(1000+x)
2000=1000+x
2000-1000=x
1000=x
- 34.56
- 40.56
- 55.52
- 25.26
- a
-
9% of 64 = 9/100*64=5.76
32% of 90=32/100*90=28.8
5.76+28.8=34.56
- 500
- 1500
- 1200
- 1800
- C
-
Let total examines is X
65% examines has passed
Failed examines=100-65=35%
Number of Failures= 420
35% of X = 420
35/100* X=420
X=420*100/35
X=1200
- 0.005
- 0.05
- 0.5
- None of these
- a
-
1/2 %
1/2*1/100
1/200
0.005
- Rs.4000
- Rs.3000
- Rs.2000
- Rs.1000
- C
-
Let the salaries of A & B= 9x & 4x
What is 15% of A Salary=?
15/100*9x=27/20x
Now, The salary of A
9x + 27/20 x=5175
(180x+27x) / 20=5175
207x/20=5175
207x=5175*20
207x=103500
x=103500/207
x=500
The salary of B is =4x
4x=4 (500)
B=2000
- 0.1
- 0.01
- 0.01
- None of these
- a
-
0.25 : x :: x : 0.04
x*x=0.25*0.04
x2=0.01
(Square Root of both sides)
X=0.1