Question
The mean weight of 'w' students in a classroom is 42 kg.
When the class teacher, weighing 61.5 kg, is added to the group, the average weight increases by 0.5 kg. Determine the number of students in the class.Solution
ATQ, Total weight of students = 42w kg Total weight of students including class teacher = 42.5 × (w + 1) kg 42w + 61.5 = 42.5 × (w + 1) 42w + 61.5 = 42.5x + 42.5 0.5w = 19 w = 38 Required number of students = 38
`[(sqrt(750) xx15.981) -: 54.003]` `xx` ? = 6997.81001
15.08% of (133.13 + 146.928) + 8.033 - (8.98 of 6.01) = ? of (46.09 - 20.98)
(95.89% of 625.15 + 36.36% of 499.89) ÷ 6.02 = ? – 269.72
Find the approximate value of Question mark(?). There is no requirement to find the exact value.
(2999.77 ÷ 74.85) + (√624.95 × 4.09) = ?
...? = 38.97² ÷ (3.99⁵ + 5.89 × 107.32) + 58.24% of (512.12 × 21.07)
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.)
2√574 + 19.956% of 1449.978 = ?% of 628.08
(24.98)2 = ?2 + (14.99)2
21% of 6600 + 453.987 =?
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