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Let the total number of students be x Average marks obtained by the students = 40 Total marks = 40x After correcting the quantitative mistakes the average decreased by (40-30) = 10 marks Total reduction = 10 × 50 = 500 Now According to the Question, (40x-500)/x = 35 35x = 40x-500 x= 100 Total number of students = 100
A girl spent 16% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 5:2. If the difference of the income ...
If 75% of a number is added to 75, the result is the number itself, then the number is:
The population of a city is decreased by 15% in the first year and then increased by 25% in the second year. Find the population of the city at the end...
In 2018, the income-to-expenditure ratio of Vishal was 5:3. The following year, his income increased by 10% while his expenditure rose by 15%. Determine...
A shopkeeper marks an item at ₹800 and offers a 20% discount. He still makes a profit of 25%. What is the cost price of the item?
A spent 25% of his monthly income on study and 60% of the remaining on rent. If amount spent on rent is Rs. 945, then find the amount spent on study
8.5 can be expressed in terms of percentage as:
A gave 40% of amount to B. B gave 20% of amount received from A to C. If amount received by C from B is Rs.184, then find the amount received by B from A.
In how many months will Rs 8,000 yield Rs 2,648 as compound interest at 20% per annum compounded semi-annually?
