Question
The average of first 12 multiples of 7
is:Solution
ATQ,
First 12 multiples of 7: 7, 14, 21, ..., 84 (AP with first term = 7, last term = 84) Average of an AP = (First term + Last term) / 2 Average = (7 + 84) / 2 = 91 / 2 = 45.5
Total monthly income of A, B and C is Rs.1,02,720.A, B and C save 20%, 10% and 25%, of their incomes. If the ratio of their monthly expenditures is 3 : ...
The monthly incomes of P and Q are in the ratio 3:4. P’s monthly expenditure is 25% less than that of Q. If P and Q save Rs. 9,...
Monthly incomes of Anil and Sunil are Rs. 36,000 and Rs. _______, respectively. Anil and Sunil save 22% and 28% of their respective incomes. The differe...
'X' allocates 20% of his income to rent, then spends 25% of the remaining income on food. From what is left, he uses 35% on educa...
- The average income of Tania, Sweta and Priya is Rs. 360. Sweta earns Rs. 30 more than Priya and Tania earns four times what Priya earns. Find Sweta’s inc...
Anju spends 16% of her monthly income on rent, 22% of it on groceries, 14% of it on children's education and 50% of the remaining on other items. If ₹...
The expenditure-to-savings ratio for Person 'A' is 5:4. If their income rises by 25% and their savings grow by 31.25%, what perce...
- If A earns Rs. 30,000, she spends 40% of it on rent and Rs. 3,000 on food, saving the remaining amount. Later, her income rises by 20%, while her rent incr...
The monthly salary of a woman is increased by Rs. 600. If her old salary was 25% less than her new salary, find her old salary.
The income to expenditure ratio for Pawan and Qureshi is 5:2 and 5:3, respectively. If the sum of their incomes is Rs. 5,500 and Pawan's savings are Rs....
