A person wants to buy one fountain pen, one ball pen and one pencil from a stationery shop. If there are 10 fountain pen verities, 12 ball pen varieties and 5 pencil varieties in how many ways can he select these articles?

There are 12 different books in a shelf. In how many ways we can select atleast one of them?

A pencil box has 5 fountain pens. 3 blue pencils. And 7 red pencils. One item is taken out of the box at random. Find the probability that the item is a: red pencil

A sports team of 11 students is to be constituted, choosing at least 5 from class XI and at least 5 from class XII. if there are 20 students in each of these classes, in how many ways can the team be constituted. What is the importance of sports in one's life ?

A pencil box has 5 fountain pens. 3 blue pencils. And 7 red pencils. One item is taken out of the box at random. Find the probability that the item is a: fountain pen

A pencil box has 5 fountain pens. 3 blue pencils. And 7 red pencils. One item is taken out of the box at random. Find the probability that the item is a: pencil

There are four bags. The first bag contains 10 identical red balls, the second bag contains 4 identical black balls, the third contains 2 identical green balls and the last bag contain 6 identical blue balls. In how may ways 6 balls can be selected if at least one ball of each colour is selected. A) 9 B) 12 C) 15 D) 18

One pencil costs Rs. 2 and one fountain pen costs Rs. 15. What is the cost of x pencils and y fountain pens?

Cost of a dozen pens is Rs 180 and the cost of 8 pencils is Rs 56. Find the ratio of the price of one pen to the price of one pencil.

There are 12 boys and 8 girls in a class (i) In how many ways can a boy be selected? (ii) In how many ways can one boy and one girl be selected?

One ball pen costs R sdotx\ and one fountain pen costs R sdotydot Find the cost of y^2 ball pens and x^2 fountain pens.