Kristin received a CD player for birthday. She bought 3 CDs and received 5 others as gifts. What fraction of her total CDs did she buy and what fraction did she receive as gifts?

Vidya and pratap went for a picnic. Their mother gave them a water bottle that contained 5 litres of water. Vidya consumed frac{2}{5} of the water. Pratap consumed the remaining water: What fraction of the total quantity of water did Pratap drink?

Susan invested certain amount of money in two schemes A and B which offer interest at the rate of 8% per annum and 9% per annum, respectively. She received Rs. 1860 as annual interest. However had she interchanged the amount of investments in the two schemes, she would have received Rs. 20 more as annual interest. How much money did she invest in each scheme?

A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that: (i) she will buy it? (ii) she will not buy it?

A lot consists of 144 ball pens of which 23 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that i] She will buy it? ii] She will not buy it ?

Nazima is fly fishing in a stream. The tip of her fishing rod is 1.8 m above the surface of water and the fly at the end of the string rests on the water 3.6 m away and 2.4 m from a point directly under the tip of the rod. Assuming that her rod to the fly) is taut, how much string does she have out(see fig)? If she pulls in the string at the rate of 5 cm per second, what will be the heriozontal distance of the fly from her after 12 seconds.