Question
Sudha decided to donate 12% of her monthly income to an
orphanage. On the day of donation, she changed her decision and donated a sum of Rs. 4800 which was equal to 80% of what she had decided earlier. What is 27% of her monthly income?Solution
Let the income of Sudha = A According to the question A × (12/100) × (80/ 100) =4800 ⇒ A = 50,000 27% of A = 50,000 × (27 /100) = 13500 Rs.
The average weight of 4 persons is 46 kg. The heaviest person’s weight is 28 kg more than the lightest person’s weight. If the average weight of the...
The average age of a group of 70 students is 13 years. If 3 students whose ages are 15 years, 21 years, and _____ years are replaced by 3 new students w...
The average cost price of 14 pens (having equal cost price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.80. ...
- A group consists of a certain number of individuals. If two members, each weighing 59 kg, leave the group, the average weight of the remaining members decr...
A bag contains 20 rupees note, 50 rupees note and 100 rupees note in the ratio 5:7:2. If the total amount in the bag is Rs 2,600, find the average numbe...
The average of 27 numbers is 20.The average of first 13 numbers is 15 and that of the last 13 numbers is 18. What will be the 27th number?
Average run scored by a batsman in first ‘x’ matches is 41. In next 12 matches he scored runs with an average of 61 so that his overall average incr...
- Three varieties of pulses priced at Rs. 28/kg, Rs. 32/kg, and Rs. ‘x’/kg are mixed in the ratio 4:3:5. If the final mixture is worth Rs. 33 per kg, the...
The average weight of five friends A, B, C, D and E is (x+8) years while the average weight of C and E is (x-8) kg. If the weight of another person F is...
- The average of ‘x’ numbers is 30. If 50% of the numbers are decreased by 6 and the remaining numbers are increased by 8, then find the new average of t...
Relevant for Exams:
