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What value should come in the place of question mark (?) in the following questions?
Solution
Expression : 43 % of 600 + ? % of 300 = 399
=> $$(\frac{43}{100} \times 600) + (\frac{x}{100} \times 300) = 399$$
=> $$258 + 3x = 399$$
=> $$3x = 399 - 258 = 141$$
=> $$x = \frac{141}{3} = 47$$
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