TOPIC 9: RATIO, PROFIT AND LOSS Ratio A ratio – is a way of comparing quantities measured in the same units Examples of ratios A class has 45 girls and 40 boys. The ratio of number of boys to the number of girls = 40: 45 A football ground 100 long and 50 wide. The ratio of length to the width = 100: 50 NOTE: Ratios can be simplified like fractions 40: 45 = 8: 9 100: 50 = 2: 1 A Ratio in its Simplest Form Express a ratio in its simplest form Example 1 Simplify the following ratios, giving…
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TOPIC 8: NUMBERS (II) Rational Numbers A Rational Number Define a rational number A Rational Number is a real number that can be written as a simple fraction (i.e. as a ratio). Most numbers we use in everyday life are Rational Numbers. Number As a Fraction Rational? 5 5/1 Yes 1.75 7/4 Yes .001 1/1000 Yes -0.1 -1/10 Yes 0.111… 1/9 Yes √2(square root of 2) ? NO ! The square root of 2 cannot be written as a simple fraction! And there are many more such numbers, and because they are not rational they are called Irrational. The Basic Operations on Rational Numbers…
TOPIC 3:Â HUMAN POPULATION Definitions of Population – Population is total number of living things of a particular type or group who live in a particular area or environment. – Population is the number of organisms of the same group or species, which live in a particular geographical area. – Population refers to all the people or animals of a particular type or group that live in one country, area, or town. Definitions of Human Population – Human population is the number of people living in a particular area, from a village to the world as a whole. – Human…
 TOPIC 7 APPLICATION OF STATISTICS Definitions of Statistics – Statistics is the practice or science of collecting and analyzing numerical data in large quantities, especially for the purpose of inferring proportions in a whole from those in a representative sample. – Statistics is the discipline that concerns the collection, organization, analysis, interpretation and presentation of data. – Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data – Statistics is the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability,…
NJOMBE CATHOLIC JOINT MOCK EXAMS WITH ANSWERS (MARKING SCHEMES) Regional Examinations – May 2025 How to download the Exams You will click the package to download the exams The Exams have been combined in a Zip File If your phone will not able to open the file, you may use Wps Office or Zip File Extractor (apps) to unzip the files.  Click the link below to download the Exams; NJOMBE EXAMS WITH ANSWERS   Advantages of School Uniform  1. Improved Behaviour Uniform has been shown to improve behaviour both inside and outside of the school gates. It means that children can concentrate…
