Banking Exam Notes

Question 1 Average of 10 observation in a series is 64. If average of first 5 observation is 45 and last 3 observation is 71 . Find the average of remaining 2? Solution Question 2 Abhinav bought 55 books for Rs. 1,020 from one shop and 60 books for Rs. 1,280 from another shop. What is the average price he paid per book?  Solution  Question 3 Average of 11 numbers is 71 and the average of first 5 numbers is 73. If average of last 4 numbers is 84 and the ratio of 6 th and 7 th number is 9 : 7, then find the 6 th number.  Solution -

Percentage - percentage means for every hundred. A percentage is a number or ratio that represents a fraction of 100. It is often denoted by the symbol "%" or simply as "percent"  New Number When a Number Is Increased/Decreased by a Certain Percent       Word Problems Based On Percentage  Question 1 Ramola’s monthly income is three times Kavita’s monthly income. Kavita’s monthly income is 25% more than Ruchi’s monthly income. Ruchi’s monthly income is Rs. 34000. What is Ramola’s Annual income?  Answer - Question 2  Five-ninth of sixty two percent of a number is equal to 2790. What is the number?  

Ratio And Proportion In Mathematics ratios and proportion is a very important concept. Let us understand the concepts with the help of examples and solved questions. Ratios Ratios are the mathematical numbers used to compare two things that are similar to each other in terms of units. For example, we can compare the length of a pencil to the length of a pen likewise distance to a unit that denotes distance. We can’t compare two things that are not similar to each other. Similarly, we can’t compare the height of a person to the weight of another person. As an illustration, suppose the weight of Rohan is 150 kg and the weight of Sohan is 300kg. A ratio of Rohan’s weight to Sohan’s weight can be found out by dividing Rohan’s weight to Sohan’s weight and vice versa. The ratio between Rohan’s and Sohan’s weight is 150/300= 1:2. A ratio is denoted by ‘:’. In the above case, we can say that 2 times the weight of Rohan equals the weight of Sohan or Rohan’s weight is half of Sohan...

AVERAGE   average " refers to the arithmetic mean, the sum of the numbers divided by how many numbers are being averaged   Average = Sum of Observations/Number of Observations => S = A × N Important Points To Remember a) If all the numbers are increased by ‘a’, then their average will also be increased by ‘a’. b) If all the numbers are decreased by ‘a’, then their average will also be decreased by ‘a’. c) If all the numbers are multiplied by ‘a’, then their average will also be multiplied by ‘a’. d) If all the numbers are divided by ‘a’, then their average will also be divided by ‘a’ Some Important Formulas Related To Average Word Problems With Answer Based On Average