Ajar is filled with a diluted chemical, five parts of which are water and seven parts are chemical. How many parts of the mixture must be drawn off and replaced with water so that it is half water and half chemical?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 12CYU
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Ajar is filled with a diluted chemical, five parts of which are water and seven parts are chemical. How many parts of the mixture must be drawn off and replaced with water so that it is half water and half chemical?

A grocer professes to sell his homemade cooking oil at the cost price, but he mixes it with vegetable oil, which he gets for free and thereby, gaining 30%. The approximate percentage of vegetable oil in the mixture is:

The avreage score of a class of 40 students is 52. What will be the average score of the rest of the students if the average score of 10 students is 61?

 

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