Question
In a box, the ratio of green balls to yellow balls is
3:5. If 9 balls of each colour are added, the new ratio becomes 6:9. Find the number of yellow balls in the box originally.Solution
ATQ,
Let the original number of green and yellow balls be ‘3x’ and ‘5x’, respectively. ATQ: (3x + 9)/(5x + 9) = 6/9 Or, 9 × (3x + 9) = 6 × (5x + 9) Or, 27x + 81 = 30x + 54 Or, 3x = 27 Or, x = 9 So, number of yellow balls in the box originally = 5 × 9 = 45
More Probability Questions
7/11 × 1034 + 1(4/7) × 2401 = 1230 +?
140% of 9/8 of ? = 108% of 2800
4.56 + 56.4 + 64.5 = ? + 10.46
- What will come in the place of question mark (?) in the given expression?
?² = 28% of 35% of 4500 12.5% of (100 + ?) = 40
What will come in the place of question mark (?) in the given expression?
? = 12.5% of 25% of 20% of 1280 + 1248
(? + 180 + 13 × 6) ÷ 20 + 3.5 × 512 (1/3) = 82
Solve for the ?
What will come in the place of question mark (?) in the given expression?
(437 + ? - 167) x 2.5 = 875(22% of 1500 + 15% of 2200) = ? x 11
