Quantitative Aptitude Topics _______________ ________ Alligation or Mixture 1. Alligation: It is the rule that enables us to find the ratio in which two or more ingredients at the given price must be mixed to produce a mixture at a given price. 2. Mean Price: The cost price of a quantity of the mixture is called the mean price. 3. Rule of Alligation: If two ingredients are mixed, then: We represent the above formula as below (Cheaper quantity) : (Dearer quantity) = (d – m) : (m – c) Also Read ► Important Banking Gk for SBI PO 2014 Exam Simple Interest 1. Let Principle = P, Rate = R% per annum and Time = T years. Then, a. S.I. = ( P × R × T ) / 100 b. P = ( 100 × S.I. ) / ( R × T ), c. R = ( 100 × S.I. ) / ( P × T ), d. T = ( 100 × S.I. ) / ( P × R ). Compound Interest 1. Let Principle = P, Rate = R% per annum and Time = T years. Then, I. When interest is compounded Annually, Amount = P (1 + R/100)N II. When interest is compounded Half-yearly: Amount = P (1 + R/2/100)2N III. When interest is compounded Quarterly: Amount = P (1 + R/4/100)4N 2. When interest is compounded Annually, but the time is in fraction, say 3⅞ years. Then, Amount = P (1 + R/100)3 × (1 + ⅞R/100) 3. When Rates are different for different years, say R1%, R2%, R3% for 1st, 2nd, and 3rd year respectively, Then, Amount = P (1 + R1/100) (1 + R2/100) (1 + R3/100) 4. Present worth of Rs. x due n years hence is given by: Present Worth = x / (1 + R/100)n
Posted on: Mon, 07 Jul 2014 04:42:45 +0000