The number that is to be added to 10 of 320 to have the sum as 30 of 230 isa ........

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The number that is to be added to 10% of 320 to have the sum as 30% of 230 isa

Let the number be x,
According to the question,
10% of 320 + x = 30% of 230
⇒ 100/100 x 320 + x = 30 /100 x 230
⇒ 32 + x = 69
⇒ x = 69 – 32 = 37

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