Advertisements
Advertisements
प्रश्न
The population of the town is 180,000, out of which males are `1/3` of the whole population. Find the number of females. Also, find the ratio of the number of females to the whole population.
Advertisements
उत्तर १
Total population = 1,80,000
Population of males = `1/3` × 1,80,000 = 60,000
∴ Population of females = 1,80,000 – 60,000 = 1,20,000
The ratio of females to the whole population
= 1,20,000 : 1,80,000 = 12 : 18 = 2 : 3
उत्तर २
The total population of the town = 180,000
The number of males = `1/3` of the total population
Number of males `=1/3×1,80,000=60,000`
The number of females will be the remainder of the population after subtracting the number of males:
Number of females = Total population − Number of males
Number of females = 1,80,000 − 60,000 = 1,20,000
Ratio of females to total population `= ("Number of females")/("Total population") = 120000/180000`
Simplify the fraction:
Ratio `= (120000div60000)/(180000div60000)=2/3`
The number of females is 120,000
The ratio of females to the total population is `2/3`
APPEARS IN
संबंधित प्रश्न
If 4x + 4 : 9x – 10 is the triplicate ratio of 4 : 5, find x.
The weekly expenses of a boy have increased from ₹ 1,500 to ₹ 2,250. Find the ratio of:
(i) increase in expenses to original expenses.
(ii) original expenses to increased expenses.
(iii) increased expenses to increase in expenses.
Arrange 5: 6, 8: 9, 13: 18 and 7: 12 in ascending order of magnitude.
If a : b = 1.5 : 3.5 and b : c = 5 : 6, find a : c.
If y (3x – y) : x (4x + y) = 5 : 12. Find (x² + y²) : (x + y)².
Write the following ratio in the simplest form:
3 weeks : 30 days
Mr. Sahai and his wife are both school teachers and earn Rs 16800 and Rs 10500 per month respectively. Find the ratio of
(i) Mr. Sahai's income to his wife's income;
(ii) Mrs. Sahai's income to her husband's income;
(iii) Mr. Sahai's income to the total income of the two.
If `a/b = c/d = e/f`, prove that each ratio is `[(2a^3 + 5c^3 + 7e^3)/(2b^3 + 5d^3 + 7f^3)]^(1/3)`
Which ratio is larger 10 : 21 or 21 : 93?
Ramesh earns Rs. 28000 per month. His wife Rama earns Rs. 36000 per month. Find the ratio of rama’s earnings to their total earnings.
