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Jampani Bhavani

· started a discussion

· 1 Months ago

in question average percentage was asked not avg marks (Question: 125227.4 )

in question average percentage was asked not avg marks .
please provide clear explanation

Question:

DIRECTIONS: Study the following table to answer these questions.


Percentage of marks obtained by 7 students in 6 subjects (maximum marks for each subject is shown in brackets)


Subject→

Student ↓

History

(75)

Geo

(60)

Math

(80)

Science

(50)

English

(40)

Hindi (40)

P

76

82

95

78

66

84

Q

86

78

85

89

72

76

R

92

94

89

75

62

69

T

67

74

64

84

85

82

M

74

86

76

80

78

72

L

88

89

86

88

70

64

N

90

96

74

92

65

66
What is the approx. average percentage of marks obtained by all the students in Math’s?
Options:
A) 81.92
B) 81.29
C) 65.03 
D) 76.23
E) 85.28
Solution:

Ans: (b)         

Required % 

= \(\cfrac{95+85+89+74+64+76+86 \ \ \ \ \ \ \ \ \ \ \ }{7} \) \(\times\cfrac{80}{100}\)

= \(\cfrac{2276}{5\times7} = \cfrac{2276}{35} = 65.03%\)

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