Question
The average of a set of 25
numbers is 98. For the first 14 numbers, the mean is 84, and for the last 8 numbers, the mean is 112. Furthermore, the 17th number is 38.75% smaller than the 16th number, which is 33.33% greater than the 15th number. Calculate the difference between the 15th and 17th numbers.Solution
ATQ, Let 15th number is ‘3n’. So, 16th number = 4/3 × 3n = 4n And, 17th number = 0.6125 × 4n = 2.45n So, 3n + 4n + 2.45n = 98 × 25 – 14 × 84 – 112 × 8 = 378 Or, 9.45n = 378 Or, n = 40 Desired dierence = 3n – 2.45n = 0.55n = 0.55 × 40 = 22
In the historic COP 28 meeting held in Dubai, what groundbreaking decision did negotiators from nearly 200 Parties make, showcasing global solidarity?
Which dance form of Goa is also known as the ‘Warrior Dance’?
Andal was one of the most famous women ___________ saints.
Which of the following is made to heat tetrafluoroethene on high pressure with free radical or percussive catalyst?
Who among the following athletes was appointed as the Deputy Superintendent of Police by the Assam Government in February 2021?
Dinyar Contractor who recently passed away was related to which profession?
India has categorised its wetlands into how many categories?
Who is known as the father of genetics?
Under the ‘Pradhan Mantri Jan-Dhan Yojana’ the accidental insurance cover has been increased from 1 Lakh to how much Rs now?
Bharat NCAP, is a New Car Assessment Program designed for India and aims to evaluate the safety performance of cars sold in India. On which date did the...
