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Let the first term of the AP be a & the common difference = d 8th term = A8 = a + 7d 12th term = A12 = a + 11d According to question, 8 × (a + 7d) = 12 × (a + 11d) 8a + 56d = 12a + 132d 12a − 8a = 56d − 132d 4a = −76d a = −19d a + 19d = 0 = A20
The ratio of males and females in a zoo is 4:5 respectively and the percentage of children among males and the percentage of children among females are ...
The ratio between two numbers is 1:2. If each number is increased by 8, the ratio between then become 5:6, find the difference between numbers.
P, Q, and R began a business with their investments in the ratio 3:5:6. The profits were distributed in the ratio of 12:54:35 among P, R, and Q, respect...
The ratio of two numbers is 3:5. If each number is decreased by 5, the ratio becomes 5:9. Find the smaller numbers.
Three numbers are in ratio 5:6:7. If the sum of the squares of those three numbers is 440 then find the sum of the three numbers.
The ratio of income of A, B, C is 7:9:12 and the ratio of expenditure is 8:9:15. If A saves 1/4 of his income, then what will be the ratio of their savi...
The ratio of the two numbers is 4:7. 110% of the first number is equal to the 80% of the second number. Find the sum of both the numbers.
The price of sugar is increased by 15%. If the expenditure is not allowed to increase, the ratio between the reduction in consumption and the original c...
In a collection of coins consisting of 20-paise, 25-paise, and 50-paise denominations, the coins are present in a ratio of 45:32:14. The combined value ...
Find the mean proportional of 2.56 and 8.41.
