Question
In a class of 60, where girls are twice that of boys,
Rohan ranked seventeenth from top. If there are 9 girls ahead of Rohan, how many boys are after him in rank?Solution
Sol: Let the number of boys be x. Then, number of girls = 2 x ∴  x + 2 x = 60 or x = 20 So, number of boys = 20 and number of girls = 40 Number of students behind Rohan in rank = 60 – 17 = 43 Number of girls ahead of Rohan in rank = 9 Number of girls behind Rohan in rank = 40 – 9 = 31 ∴ Number of boys behind Rohan in rank = 43 – 31 = 12
- 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.)
14.12 × 21.98 + 25.22% of 195.99 = ? × 50.9
(2520.33 ÷ 41.67) × (√168.88 + √80.78) - 10% of 1499.85 = ?
√483.98 + 120.02 of 119.89 ÷ 59.87 of 29.87 = ?
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.)...
784.69 + 86.96 ÷ 29.01 = 40.01 + ? + 367.88
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.)...
1240.04 – 360.18 + 449.98 ÷ 15.06 = ?
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.)...
