Question
A box contains (x + 10) pencils, (x + 15) pens, and (x +
20) markers. The probability of drawing a marker from the box is (2/5). Find the number of pens in the box.Solution
According to question, (x + 20)/[(x + 10) + (x + 15) + (x + 20)] = 2/5 Simplify and solve for x: 5(x+20) = 2(3x + 45) 5x +100 = 6x+ 90 6x -5x = 100-90 x = 10 Therefore, number of orange balls in the bag = 10 + 15 = 25
More Probability Questions
√323.89 × (3.20) ÷ 9.02 =?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
23.98% of 624.99 = 19.98% of ? + 14.98% of 639.99
Direction: Please solve the following expression and choose the closest option
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
12, 16, ?, 36, 52, 72
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
(6859.01)1/3 × 10.11 × 14.47 ÷ 20.32 = ? + 45.022
33.33% of 809.891 + 66.66% of 212.91 = ?
Relevant for Exams:
