Question
The average weight of 8 students in a class is (x + 15).
If the average of the first four students is 30 kg and the average of the last four students is 40 kg, find the value of (x + 25).Solution
According to the question, The average weight of 8 students = (x + 15) = 8 * (x + 15) The average weight of first four students = 4 * 30 = 120 The average weight of last four students = 4 * 40 = 160 120 + 160 = 8 * (x + 15) 280 = 8(x + 15) 35 = x + 15 x = 20 x + 25 = 45
33.33% of 809.891 + 66.66% of 212.91 = ?
 5983.987 + 59832.999 – 598.873 = ?
20.02% of (95.96 × 104.01 – 56.02 × 64.04) – ? = 12.02 × 39.96 + 103.03
(462.23 × 127.84 ÷ 153.88) ÷ √(31.98 × 7.92) = ? ÷ 15.15
19.87% of (49.68 × ?) = 19.78% of 1099.87
? = 49.83% of 39.72% of (45.011.99 – 4.98 2.04)
- 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.)...
30.11% of 149.99 + √ 143.97 ÷ 12.02 = ?
181.87 ÷ 13.89 X 8.13 + ? = 11.852Â
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