Question
If 2x + 3y = 17 and
2x+2 – 3y+1 = 5, then :Solution
ATQ, Given 2x+3y=17 , 2x+2−3y+1=5 by observation, we can say that at x=3 y=2 ⇒23+32=17 and 25−33= 32 − 27 = 5 =5 ∴x = 3y = 2
In a lock-making factory, 10 percent of the total produced locks were found to be defective, and 80 percent of the non-defective locks were exported. ...
- Rohit purchased a mobile phone for Rs. 18,500 and sold it for Rs. 21,465. Find the percentage of profit he made.
The number of trees in a park increases by 12% every year. If the number of trees after 2 years will be 3,136, find the current number of trees in the p...
A man spends 72% of his income. If his income increases by 28% and his expenditure increases by 25%, then what is the percentage increase or decrease in...
- A person paid Rs. 13500 for a refrigerator after a single discount of 25%. If he had been given successive discounts of 15% and 15%, how much would he have...
Out of his total income, Rahul spent 25% on rent, 35% of the remaining income on groceries, and saved 60% of the income left after his expenses.
The price of a commodity has risen by 40%, leading to a 25% decrease in the quantity sold. What is the overall impact on total revenue?
- During an election, 5% of the total electorate didn’t cast their votes. The winning candidate secured 51% of the total votes and won by 1400 votes. Deter...
Income of A is twice the income of B. B and A spend 75% and 85% respectively of their incomes. Find the savings of A, if B saves Rs. 18000 in a month.
The earnings ratio of individuals 'P' and 'Q' stands at 5:3, respectively. 'P' manages to save 20% of their income, which is precisely 80% of what 'Q' s...
