Out of five girls and three boys. four children are to be randomly selected for a quiz contest. What is the probability that all the selected children are girls?

 Amit and Sujit together can complete an assignment of data entry in five days. Sujit's speed is 80% of Amit's speed and the total key depressions in the assignment are 5,76,000. What is Amit's speed in key depressions per hour if they work for 8 hours a day?

Inside a square plot, a circular garden is developed which exactly fits in the square plot and the diameter of the garden is equal to the side of the square plot which is 28 metres. What is the area of the space left out in the square plot after developing the garden?

The product of one-third of a number and 150% of another number is what percent of the product of the original numbers? 

It the length of a rectangular field is increased by 20% and the breadth is reduced by 20%, the area of the rectangle will be

192 m². What is the area of the original rectangle?

Mr X invested a certain amount in Debt and Equity Funds in the ratio of 4 : 5. At the end of one year. he earned a total dividend of 3094 on his investment. After one year, he reinvested the amount including the dividend in the ratio of 6 : 7 in Debt and Equity Funds. If the amount reinvested in Equity Funds was Rs 94,500, what was the original amount invested in Equity Funds?