Question
What is the ratio between the sum of the number of girls
and boys in school A and the number of teachers in school C? Read the data carefully and answer the following questions: The number of boys in school A is 40% more than the number of teachers in the same school. The number of girls in school A is 84 which is equal to the average of number of teachers and boys in the same school. Ratio of number of girls in school A and B is 7:9 respectively and the sum of number of girls in school B and C is 140. School C has two more boys than school A and 11 more teachers than school B. Ratio of number of teachers and boys in school B is 13:11 respectively while sum of number of teachers and boys in school B is 168.Solution
Let the number of teachers in school A = 5x Then the number of boys in school A = 7x According to the question, => 5x + 7x = 84 Γ 2 => x = 14 So, number of teachers in school A = 5 Γ 14 = 70 Number of boys in school A = 7 Γ 14 = 98 Number of girls in school B = 84 Γ (9/7) = 108 Number of girls in school C = 140 β 108 = 32 Number of boys in school C = 98 + 2 = 100 Number of teachers in school B = 168 Γ (13/24) = 91 Number of boys in school B = 168 β 91 = 77 Number of teachers in school C = 91 + 11 = 102 Number of boys in school C = 98 + 2 = 100 Required ratio = (98 + 84) : 102 = 91:51
Select the correct combination of mathematical signs that can sequentially replace β*β sign and balance the equation given below.
42 * 18 ...
If Γ stands for 'addition', Γ· stands for 'subtraction', + stands for 'multiplication' and - stands for 'division', then 31 Γ 18 Γ· 20 - 5 + 9 = ?
Which two signs should be interchanged to make the below equation mathematically correct?
9 Γ· 3 + 6 β 6 Γ 2 = 30
Which two signs should we interchange inorder to make the given equation true?
36 × 5 - 84 ÷ 4 + 50 = 151
If A denotes β+β, B denotes βΓβ, C denotes βββ, and D denotes βΓ·β, then what will come in place of β?β in the following equation...
Which of the following interchange of numbers and mathematical signs would make the given equation correct?
72 Γ· 8 Γ 9 β 36 + 20 = 80
If '#' means ' - ', '@' means '+', '$' means 'Γ·' and '&' means ' X ', then what is the value of the following expression?
72 # 91 $ 7 & 4 @ 18
What will be the value of expression if the numbers/digits β(42)β and β(16)β are interchanged?
16 - 32 Γ· 8 Γ 12 + 11 + 42
...If the β-β and βΓβ are interchanged, What will be the value of the following equation?
34 Γ 22 + 192 Γ· 12 β 8
...Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
[(345 + 255) Γ· 30 X 12 ...