Advertisements
Advertisements
Question
Evaluate:
70% of 70 + 90% of 90 – 120% of 120.
Advertisements
Solution
70% of 70 + 90% of 90 – 120% of 120
= `(70xx70)/100+(90xx90)/100-(120xx120)/100`
= 49 + 81 − 144
= 130 − 144
= − 14
APPEARS IN
RELATED QUESTIONS
Deepti went to school for 216 days in a full year. If her attendance is 90%, find the number of days on which the school was opened.
In an examination, a candidate secured 125 marks and failed by 15 marks. If the pass percentage was 35%; find the maximum marks.
Two numbers are respectively 20 percent and 50 percent of a third number. What percent is the second of the first?
Mohan gets Rs. 1, 350 from Geeta and Rs. 650 from Rohit. Out of the total money that Mohan gets from Geeta and Rohit. what percent does he get from Rohit?
Air is an important inexhaustible natural resource. It is essential for the survival of human beings, microbes, plants, and animals. The following table shows the percentage of various gases in the air.
| Contents of air | Percentage (by volume) |
| Nitrogen | 78 |
| Oxygen | 21 |
| Other (carbon dioxide, inert gases, water vapours, etc.) | 1 |
If a certain quantity (by volume) of air contains 4,200 litres of oxygen, find the total quantity of air taken and the amount of nitrogen in it.
A picture of chess board is given. The squares that do not have the pieces
In Delhi University, in the year 2009 – 10,49,000 seats were available for admission to various courses at graduation level. Out of these 28,200 seats were for the students of General Category while 7,400 seats were reserved for SC and 3,700 seats for ST. Find the percentage of seats available for students of General Category.
30% of ₹ 360 = ______.
A ______ with its denominator 100 is called a per cent.
Given below is a Mathematical term.
Find the percentage of consonants in the term.
