Question
In a class of 40 students, the average weight is 72 kg.
One student of weight 68 kg left and three new students with an average weight of 75 kg joined the class. When a teacher’s weight is also included, the average weight of the class becomes 74 kg. What is the weight of the teacher?Solution
Initial total weight of the class = 40 × 72 = 2880 kg
The sum of weight of 3 new students = 3 × 75 = 225 kg Let the weight of the teacher be ‘y’ kg.
New total weight of the class without teacher = 2880 - 68 + 225 + y = (3037 + y) kg
New total number of people = 40 - 1 + 3 + 1 = 43
New total weight of the class with teacher = 74 × 43 = 3182 kg
So, weight of the teacher = 3182 - 3037 = 145 kg
What is malware?
Given below are two statements
Statement I: The use of ICT in organizing teaching-learning programmes in the universities has the potential ...
_______ selects, interprets and executes instruction in CPU
Which Windows utility allows users to browse folders and manage files on a computer?
The minimum number of page frames that must be allocated to a running process in a virtual memory environment is determined by ____________
JS Kilby developed which chips?
The shortcut for copying selected content is:
A device needed to communicate with computers using telephone lines is?
In Google Sheets, which feature allows the warden to see when and who last edited any given cell?
Which of the following devices uses flash memory technology?
Relevant for Exams:
