Question
In a mixed school 25% of the scholars are infants under
7 and the number of girls above 7 is 4/5 of the number of boys above 7, is 120. Find the number of scholars in the school.Solution
Let the total number of scholars in the school be x. Number of infants under 7 = (25 x)/100= x/4 ∴ Remaining scholars = x- x/4 = (3 x)/4 ∵ Number of girls above 7 = 4/5 of Number of boys above 7 Now, 120 = 4/5× number of boys above 7 Number of boy above 7 = 150 ∴ 3x/4 = 120 + 150 ⇒ (3 x)/4 = 270 ⟺ x = 360
A shopkeeper acquires 24 pens at Rs. 900 each and 12 geometry boxes at Rs. 300 each. Later, he sells 2 pens to each of the 12 students, presenting them ...
A man has Rs. 15,000 with him. He gives away 12% of this for charity, 15% of the remaining amount for education, and 20% of the new remaining amount for...
Monthly savings of ‘A’ is Rs. 1600 more than his monthly expenditure and his total monthly income is Rs. 4800. If his monthly income is increased by...
'U' spends 25% of his monthly income on food, 30% on rent, and 15% of the remaining amount on insurance. He saves the rest in a savings plan that gives ...
In the Reebok factory, there are two units of workers, I and II, with a strength ratio of 2:1. The ratio of male to female in Unit I is 3:1, and in Unit...
After increase in the price of coffee by 20 %, a person is able to buy 4 kg less for Rs. 1,440. Find the original and increased price of the coffee per ...
Ajit's monthly income is Rs. 58,000, while Sujit's monthly income is Rs. 54,000. Sujit spends 82% of his income, and Ajit spends 77% of his income. Cal...
After increase in the price of coffee by 15%, a person is able to buy 3 kg less for Rs. 1,840. Find the original and increased price of the coffee per kg?
The boys and girls in a college are in the ratio 4:3. If 15% of the boys and 22% of the girls are adults, the percentage of students who are not adults ...
A shopkeeper marks the price of an article 40% above its cost price. During a sale, he offers a discount of 25% on the marked price. What is his overall...
Relevant for Exams:
