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Indices. 5 Marks Definition, Fundamental Laws of Indices (am an= am+n, am/an= am-n, (an)n = am ) and reductions from it. 4. Ratio and proportions. 5 Marks Definition of ratio, compound of ratio, properties of ratio. Definition of proportion, fourth proportional, mean proportional and third properties, Continued proportion. Law of propoption-Alternendo, Invertendo,Componendo, Devidendo, Componendo and devidendo. K Method. 5. Simple Interest. 10 Marks Calculation of Interest, Principal, Rate, Time, Amount. 6. Compound Interest. 10 Marks Calculation of compound interest, principal, rate, time, amount (yearly & half yearly). 7. Percentage. 10 Marks Meaning,-Calculation of percentage, regarding, marks, population, money, income etc. 8. Profit and Loss. 10 Marks Calculation of profit or loss and percentage profit or loss, calculations of cost price and selling price. Total profit or loss while bying and selling different articles at different rates. 9. Statistics upto Mean and Median. 10 Marks Histograms, class marks, cumulative frequency, cumulative frequency tables, Drawing of frequency ploygons, Octagon, Calculation of means including short cut method, calculation of median and their merits and demerits. 10. Trigonometry. 10 Marks (i) Angles and measurements. Convention of sign of angles, Measurement of angles, cicular measurement differnent units of angles (Degree, Radians ) Relation between degrees and radians. The relation S = r ╪ is in radians. The length and area of a sector of circle. (ii) Trigonometric functions and their values. Trigonometric ratios and their relationship. Proving simple Identeities, Limp of Trigonometric ratios, Trigonometric ratios of standard angles, Trigonometric ratios of Allied angles, preriods of Trigonometric functions. 11. Permutations and combinations. 10 Marks (i) Factional notations. (ii) Fundamental principles (iii) Concept of nPr. 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