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Find x, if 30% of 400 + x% of 70 = 25% of 536.

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Find x, if 30% of 400 + x% of 70 = 25% of 536.
1. 30
2. 40
3. 10
4. 20
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Correct Answer - Option 4 : 20

Given:

30% of 400 + x% of 70 = 25% of 536.

Calculation:

30% of 400 + x% of 70 = 25% of 536.

⇒ 30/100 × 400 + x/100 × 70 = 25/100 × 536

⇒ 120 + 7/10x = 134

⇒ 7/10x = 14

⇒ x = 20

∴ The value of x is 20. 

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