SBI Associate Clerk 2008

Let the rate of interest on the principal be R.

So, 19800*R*3/100 = 7128

So, R = 12%

Hence, the compound interest on the same amount for the same time period equals 

19800*1.12^3 - 19800 = 27817.57 - 19800 = Rs. 8017.57

Let the original fraction be $$\frac{X}{Y}$$

After 400% increase, the numerator becomes $$5X$$ and after 500% increase, the denominator becomes $$6Y$$

Hence, the resulting fraction becomes $$\frac{5X}{6Y}=\frac{10}{21}$$

So, $$\frac{X}{Y} = \frac{4}{7}$$

The required number is $$\frac{26}{100}*\frac{55}{100}*\frac{10}{13}*6100 = 671$$

As this is not among the options given, the correct answer is 'None Of These'

Let the ages of Aarzoo and Arnav be X and Y respectively.

Hence, $$\frac{X}{Y}=\frac{11}{13}$$

Similarly, $$\frac{X+7}{Y+7}=\frac{20}{23}$$

Solving both the equations, we get $$X=33$$ and $$Y=39$$

So, the difference in ages equals 6

The number equals 8 times 17.25 = 138

Hence, 73% of the number equals 0.73*138 = 100.74

Total number of girls enrolled in painting in institution A and C = 250+150=400

Total number of girls enrolled in stitching in institution D and E = 250+325 = 575

The ratio = 400/575=16:23

The number of girls for stitching in institute B= 250

Total number of girls enrolled in stitching in all institutes= 250+325+50+250+350=1225

Now,
Percent of girls enrolled in stitching in Institute B of the total number of girls enrolled in stitching in all the Institutes together = 250/1225*100= 20.4~21

Hence, correct option is option B.

Number of girls enrolled in painting = 250+225+150+150+325=1100

Number of girls enrolled in stitching = 325+250+50+250+350= 1225

Number of girls enrolled in dancing = 150+200+90+400+350= 1190

The require ratio is = 1100:1225:1190~44:48:47

Number of girls enrolled in dancing= 150

Total number of girls enrolled in hobby classes= 150+250+325 = 725

Percent number of girls enrolled in Dancing in Institute A of total number of girls enrolled in all the Hobby classes together in that Institute = (150/725)*100= 20.69

Total number of girls enrolled in painting together in all institutions = 250+225+150+150+325=1100

Hence, the correct option is option D.