Question
Arun has 96 toy cars – some red and some black. If he
buys 36 more red toy cars, the ratio of red to black cars becomes 7:5. Find the number of red toy cars Arun initially had.Solution
Let the number of red and black toy cars after buying 36 more be '7x' and '5x' respectively. ATQ: 7x + 5x = 96 + 36 12x = 132 x = 11 Number of red toy cars after buying = 7x = 7 × 11 = 77 Number of red toy cars Arun initially had = 77 – 36 = 41
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