A Pencil

4 Pens and 6 Pencils cost Rs. 80. Find the cost of 12 pens and 18 pencils.

A box contains 8 red pencils and some blue pencils. If the probability of drawing a blue pencil is three times of a red pencil, then the number of blue pencils in the bag are:

A has 8 pencils, B has 10 pencils and C has 15 pencils , then the average number of pencils with them :

A bag contains 8 red pencils and 5 black pencils. What is the probability of getting a yellow pencil when one pencil is drawn at random?

John bought 3 pencils for 6 .Earlier the price of 3 pencils was 3.Find the increase in the price of one pencil.

Statements: Some books are pens No pen is pencil Conclusions: I. Some books are pencils II. No book is pencil