The number of boys and girls in a class are in the ratio 7 : 5. The number of boys
is 8 more than the number of girls. What is the total class strength?
Answers
ANSWER ------»
STRENGTH=> 48 students
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EXPLAINATION ---------»
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LET, US TAKE -------›
=> THE NO'S OF BOYS ------» 7x
=> THE NO'S OF GIRLS ------» 5x
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TO, FIND ---------»
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ACCORDING TO THE QUESTION -------›
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=> 7x = 5x + 8
=> 7x – 5x + 8
=> 2x = 8
=> X = 4
HENCE,
=> THE NO'S OF BOYS = 7x = 7×4 = 28
=> THE NO'S OF GIRLS = 5x = 5×4 = 20
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=> Therefore, The total strength of class
=> 28 + 20
=> 48 students.
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SO, TOTAL NUMBERS OF STUDENTS IN A CLASS INCLUDING GIRLS AND BOYS ARE 48.
Let the number of boys be 7x and girls be 5x.
According to the question,
7x = 5x + 8
⇒ 7x – 5x = 8
⇒ 2x = 8
⇒ x = 8/2
⇒ x = 4
Therefore, Number of boys = 7×4 = 28
And, Number of girls = 5×4 = 20
Total number of students = 20+28 = 48