The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10,000 , the present population is
1). 4600
2). 6400
3). 7600
4). 6000
.= 10000 ($1-\frac{(20)^{2}}{100}$)
= $10000\times\frac{4}{5}\times\frac{4}{5}$
= 6400
2. What is 35% of 45% of $$\frac{7}{9}$$ of 3600?
5. 0ne-eighth of a number is 17.25. What will 73% of the number be ?
6. 5% of 420 ? ? % of 1 50 = 252
8. If 20% of a = b, then b% of 20 is the same as:
9. What value will come in place of the question mark (?) in the following questions.