Question

There are 440 balls (wooden + rubber) in a box. Number of wooden balls in the box are 20% more than number of rubber balls in the box. If 40% of the rubber balls in the box are blue, then find the number of blue rubber balls in the box.

A 48 Correct Answer Incorrect Answer
B 60 Correct Answer Incorrect Answer
C 72 Correct Answer Incorrect Answer
D 80 Correct Answer Incorrect Answer
E 100 Correct Answer Incorrect Answer

Solution

Let number of rubber balls in the box be 'x' So, number of wooden balls in the box = 1.20 × x = '1.20x' ATQ: 1.20x + x = 440 Or, 2.20x = 440 So, x = 200 So, number of rubber balls in the box = 200 So, number of blue rubber balls in the box = 200 × 0.40 = 80

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