The class marks of distribution are : 6, 10, 14, 18, 22, 26, 30. Find the class size and the class interval.
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In an examination it is required to get 270 of the aggregate marks to pass. A student gets 216 marks and is declared failed by 8% marks.
(b) Difference = 270 - 216 = 54 According to the question, 8% of total aggregate marks = 54 Total aggregate marks = 54 x 100/8 = 675
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In an examination it is required to get 40% of the aggregate marks to pass. A student gets 261 marks and is declared failed by 4% marks.
(e) According to the question, (40 – 4)% of x = 261 Max marks = 261/36 x 100 = 725
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A student scores 64% marks in 6 papers of 150 marks each. He scores 25% of his total obtained marks in Hindi and English together.
(d) Total marks obtained by the student = 6 x 64/100 x 150 = 576 Marks obtained in Hindi and English = 25% of 576 = 576 x 25/100= 14
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In a examination it is required to get 40% of the aggregate marks to pass. A student gets 265 marks and is declared failed by 55 marks
(a) Let the maximum marks be x (265+55) = 40x/100 or 320 x 100= 40x x= 320 x 100/40 = 800
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The average of marks obtained by 4 students in a class is 65. Find the sum of marks obtained?
Here, number of students = 4 Average = 65 sum of marks obtained = 65 × 4 = 260
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The average marks of a student in seven subjects is 41. After re-evaluation in one subject the marks were changed
The average marks of a student in seven subjects is 41. (a) New average marks = (7x41-14+42) /7 =(287+28)/7 =315/7 =45
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In a test, minimum passing percentage for girls and boys is 30% and 45% respectively. A boy scored 280 marks and failed by 80 marks.
(a) Total marks in the test = (280 + 80) x 100 /45 = 800 Passing marks for girls = 800 x 30/100 = 240 Required marks = 240 – 108 = 132
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In an examination it is required to get 336 aggregate marks to pass. A student gets 35% marks and is declared failed by 42 marks.
(e) Let the maximum marks be x According to the question, 35x /100 +42 =336 x = 840
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Mathew scored 42 marks in Biology, 51 marks in Chemistry. 58 marks Mathematics, 35 marks in Physics and 48 marks in English.
(d) Marks scored by Mathew = 42 + 51 + 58 + 35 +48 = 234 Max.Marks = 60 × 5 = 300 Percentage scored = 234 /300 x 100 = 78%
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Akash scored 73 marks in subject A. He scored 56% marks in subject B and X marks in subject C.
(b) Marks scored in subject B = 150 × 56% = 84 Total marks scored in all the 3 subjects = (150 × 3) × 54% = 243 Marks scored in subject C...
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