Question
In a village, number of male, female and children are in
the ratio of 3:5:7. If 90% of the males are literate, 80% of females are literate and 40% of children are illiterate, find the % of number of illiterate persons in the village.Solution
Let us assume that no. of Male, Female and Children be 300, 500 and 700 respectively. Total no. of persons = 1500 No. of literate males = 90% of 300 = 270 No. of illiterate males = 300 - 270 = 30 No. of literate females = 80% of 500 = 400 No. of illiterate females = 500 - 400 = 100 No. of illiterate children = 40% of 700 = 280 No. of literate children = 700 - 280 = 420 Total no. of illiterate persons = 30 + 100 + 280 = 410 So % of illiterate = `(410/1500)xx100` = 27.33%
Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 20x + 96 = 0
Equation 2: y² - 18y + 72 = 0
I. 56x² - 99x + 40 = 0
II. 8y² - 30y + 25 = 0
I. 7x² + 52x + 21 = 0
II. 6y² + 7y - 24 = 0
I. 96x² + 52x - 63 = 0
II. 77y² + 155y + 72 = 0
I. x2 + 16x + 63 = 0
II. y2 + 2y - 15 = 0
I. 104x² + 9x - 35 = 0
II. 72y² - 85y + 25 = 0
I. 9x2 + 45x + 26 = 0
II. 7y2 – 59y − 36 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 40x + 300 = 0
Equation 2: y² - 30y + 216 = 0
I.√(3x-17)+ x=15
II. y + 135/y=24
Solve the quadratic equations and determine the relation between x and y:
Equation 1: 21x² - 82x + 80 = 0
Equation 2: 23y² - 132y + 85 = 0