19 20 16 25 9 ?

7.4 9.2 11.4 14 17 ?

A bag contains 5 red balls, 6 yellow balls and green ball. If two balls are picked at random what is the probability that either both are red or both are green in colour?

If a 140 L of mixture of milk and water, percentage of water is only 30%. The milkman gave 20 L of this mixture to a customer. Then he added equal quantities of pure milk and water to the remaining mixture. As a result the respective rartio of milk and water in the mixture became 2 : 1. What was the quantity of milk added?

A boat can travel 4.2 km upstream in 14 min. If the respective ratio of speed of the boat in still water and speed of the steam is 7:1. How much time will the boat take to cover 17.6 km downstream?

A starts a business with a capital of Rs. 1500. B joins the business 6 months later from the start of the business and C joins the business 8 months later from the start of the business. End of the year their respective share in profit was in ratio of 5 : 3 : 3. What is the sum of amount put in the business by B and C together?

The length of a rectangle is 4 m more than the side of a squre and the breadth of the rectangle is 4 m less than side of the same square. What is the area of the square is 567 sq m, what is the area of the rectangle?

A sells an item at 20% profit to B. B sells it to C at 10% profit. C sells it to D at Rs. 16 proft. Different between the cost price of D and cost price of A was Rs. 500. how much did B pay to A for the item?

10 men can finish a piece of work in 15 days. 8 women can finish the same piece of work in 25 days. Only 10 women started working and in few days completed certain amount of work. After that 3 men joined them. The remaining work was completed by 10 women and 3 men together in 5 days. After how many days 3 men joined 10 women?

Rs. 16000 was invested for three years, partly in scheme A at the rate of 5% simple interest per annum and partly in scheme B at the rate of 8% simple interest per annum. Total interest received at the end was Rs. 3480. How much sum of money was invested in scheme A?