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
If 60% of a certain number is equal to 2/5th of another number, what is the ratio between the numbers?
In a coaching institute, there are 80 mathematics teachers, 60 English teachers, 100 physics teachers, and 40 chemistry teachers. The ratio of male to f...
The ages of A, B and C are in the ratio of 5:3:7 respectively. If the sum of their ages is 60 years, then find the age of B.
If A:B:C = 3:4:7 and (C - A + B) = 48, then find the value of (2C + A2).
Divide 297 into two parts such that one may be to the other as 2:9.
...The ratio of land and water on the entire Earth is 1:2. If this ratio is 1:4 in the Northern Hemisphere, then what will be this ratio in the Southern He...
Average run per wicket of a bowler is 11.5. In his next innings bowler took 5 wickets and conceded 40 runs, thereby he reduced his bowling average by 0....
The ratio of the two numbers is 3:8. 140% of the first number is equal to the 60% of the second number. Find the sum of both the numbers.
If 3 kg of metal, of which 1/4 is aluminium and the rest is magnesium, be mixed with 5 kg of metal, of which 1/3 is aluminium and the rest is magnesium,...
Rs.14000 was divided among A, B and C in the ratio 2:2:3. B kept Rs.1200 for himself, gave Rs.600 to his mother and divided the remaining money among hi...
