Hello sir, Can you please explain this question
Rajiv is a student in a business school. After every test he calculates his cumulative average. QT and OB were his last two tests. 83 marks in QT increased his average by 2. 75 marks in OB further increased his average by 1. Reasoning is the next test, if he gets 51 in Reasoning, his average will be _____?
In June a football team played 60 games and won 30% of these. After a phenomenal winning streak , this team raised its average to 50% . How many games did the team win in a row to attain this average?
In an office, there are n employees and their average age is 36 years. After two years, 5 employees whose average age is 40 years, leave the office and next after three years 5 employees whose average age is 30 years, joined the office. Now the average age of the employees of the office becomes 39.7 years. Find the number of employees in the office initially.
a set of consecutive positive integers beginning with 1 is written on the blackboard .a student came along and erased one number.the average of the remaining numbers is 37(31/37).what was erased number?
The average of the squares of First 'n' natural numbers starting from 1 is 130 . Then , what is the average of the cubes of these first n natural numbers ?
Swati has three cartons of books. The average price of the books in carton 1 was Rs 64, the average price of the books in Carton 2 was Rs 82 and the average price of the books in Carton 3 was Rs 95. The average price of all the books in Carton 1 and Carton 2 together was Rs 78 and the average price of all the books in Carton 2 and carton 3 together was Rs 90. What was the average price of the the books of three cartons?
A shipping clerk has five boxes of different but unknown weights. The clerk weighs the boxes in pairs. The weights obtained are 101, 102, 103, 104, 105, 106, 107, 108, 109, 111kg. What is the weight of the heaviest box?
the average age of 200 employees in an organization in 1990 was 40 yrs. in 1992, 40 employees whose avg age was 50 yrs, left the organisation. after 4 years , 20 employees whose avg age was 32 yrs, joined the organisation. what was the avg age of all the employees in the year 2000?
There are seven consecutive natural numbers such that the average of the first five is
n. Then the average of all seven numbers will be
C. kn+1/k, where k is a positive constant