Question
The combined value of ‘r’ and ‘s’ is 750. If
‘r’ is decreased by 4% and ‘s’ is increased by 16%, they become the same. Find the value of ‘s’.Solution
ATQ,
r + s = 750 ……(i)
ATQ,
0.96 × r = 1.16 × s
Or, r = (1.16 / 0.96) × s
So, r = (29s / 24)
Put the value of ‘r’ in equation (i), we get,
(29s/24) + s = 750
Or, (53s/24) = 750
Or, s = 750 × (24/53)
So, s = 339.62
Komal bought 20 kg rice for Rs 30 per kg, b kg rice for Rs 35 per kg and (b + 4) kg rice for Rs 25 per kg. She mixed all type of rice together and the a...
The average salary of 36 employees ( Teachers+principals) in a School is Rs.10,375. A Principal in the School receives a salary that is 125% higher than...
The average age of a team of 6 members is 35 years. If the oldest member retires, the average age of the team decreases by 3 years. Find the age of the ...
The average price of 10 stickers is Rs.12 while the average price of 8 of these stickers is Rs.11.75. Of the remaining two stickers, if the price of one...
X and Y have weights of 36 kg and 60 kg, respectively. Z weighs 12 kg less than X. Calculate the average weight of X, Y, and Z.
The average daily income of a daily wage worker, in the month of July is Rs. 120. If his average income on 1st 12 days of the month is Rs. 80 and on las...
In an exam of 100 marks, the average marks of a class of 38 students are 72. If the top 3 scorers of the class leave, the average score falls “dow...
In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced...
The average marks of 50 students in an examination was 65. It was later found that the marks of one student had been wrongly entered as 83 instead of 38...
The average age of 22 girls is 40 years. If the age of two more girls is added the average decreases by 2.5 years. What is the sum of the age of new girls?