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Instructions
What will come in place of the question mark (?) in the following questions ?
Solution
Expression : 35% of 160 + ?% of 180 = 50% of 310
=> $$\frac{35}{100} * 160 + \frac{?}{100} * 180 = \frac{50}{100} * 310$$
=> $$(160 * 35) + (180 * ?) = (310 * 50)$$
=> $$180 * ? = 15500 - 5600 = 9900$$
=> $$? = \frac{9900}{180} = 55$$
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