Question
The average of 16 numbers is 20. The average of 1st 7
numbers is 15 and the average of the last 7 numbers is 25. The 8th number is 16 more than the 9th number. What is the value of the 8th and 9th numbers?Solution
Let the 8th and 9th numbers be x and y respectively. Sum of 16 number = 16 × 20 = 320 Sum of first 7 number = 7 × 15 = 105 Sum of last 7 number = 7 × 25 = 175 ATQ: x + y = 320 - 105 - 175 x + y = 40 We know that: x = 16 + y so, 16 + y + y = 40 2y = 40 - 16 = 24 y = 12 then, x = 16 + 12 = 28Â
Which of the following is a valid page orientation in MS-Word 2019?
(i) Landscape (ii) Portrait
Which number system is used by computers to store data and perform operations?
Dial-up modems have a data transfer speed of up to ______.Â
What is the absolute address of the cell at the intersection of fifth row and fifth column?
The Uttar Pradesh government has hiked dearness allowance (DA) for its employees and dearness relief to its pensioners by _____ from January 1, 2023.
The pathway for transferring instructions between the processor and memory is _______. Â
When a transaction completes successfully and its effects are permanently recorded in the database, it is said to be:
Which of the following is an example of non-volatile memory? Â
What device is used to connect computers to telephone lines for communication?
Which of the following operating systems is open-source and not owned by any specific company?
Relevant for Exams:
