Directions for the following four questions: Answer the questions on the basis of the information given below.

Purana and Naya are two brands of kitchen mixer-grinders available in the local market. Purana is an old brand that was introduced in 1990, while Naya was introduced in 1997. For both these brands, 20% of the mixer-grinders bought in a particular year are disposed off as junk exactly two years later. It is knows that 10 Purana mixer-grinders were disposed off in 1997. The following figures show the number of Purana and Naya mixer-grinders in operation from 1995 to 2000, as at the end of the year.

Question 49

How many Naya mixer-grinders were disposed off by the end of 2000?


Number of Naya mixer-grinders were disposed off by the end of 1999 are 6 and at the end of 2000 are 10. So in total 16 naya mixer disposed off. 

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