Question
A shopkeeper offered two back-to-back discounts of x% and
sold an article for Rs. 1800. The marked price was Rs. 3200. What was the percentage of each discount?Solution
ATQ,
3200 × (100 – x)% × (100 – x)% = 1800
0.32 × (100 – x)² = 1800
(100 – x)² = 5625
100 – x = 75
x = 25
So, the value of ‘x’ is 25%
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
13.99% of 299.99 ÷ 7.17 = ? ÷ 16.15
35.11% of 159.99 + √195.97 ÷ 7.02 = ?
10.232 + 19.98% of 539.99 = ? × 7.99
24.035 × √? = 4607.89 ÷ 11.8259Â
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
16.99% of 399.99 ÷ 17.17 = ? ÷ 15.15
What approximate value will come in place of question (?) in the following given expression? You are not expected to calculate the exact value.
...What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
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