Question

There are 750 pens (gel + ball) in a shop. Number of gel pens are 50% more than number of ball pens. If 40% of the ball pens are black, then find the number of black ball pens.

A 60 Correct Answer Incorrect Answer
B 90 Correct Answer Incorrect Answer
C 120 Correct Answer Incorrect Answer
D 150 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Let number of ball pens in the shop be 'x' So, number of gel pens in the shop = 1.50 × x = '1.50x' ATQ: 1.50x + x = 750 Or, 2.50x = 750 So, x = 300 So, number of ball pens in the shop = 300 So, number of black ball pens = 300 × 0.40 = 120

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