102. In a school, the ratio of boys to girls is 4:5.
If 100 girls leave the school the ratio becomes
6:7. How many boys are there in the school?
a) 1400
b) 1500
c) 2400
d) 1200
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Answers
Answer:
d) 1200 is your answer
Step-by-step explanation:
pls follow kar do
Given : In a school, the ratio of boys to girls is 4:5.
100 girls leave the school the ratio becomes 6:7.
To Find : How many boys are there in the school?
a) 1400
b) 1500
c) 2400
d) 1200
Solution:
Let say Boys in school = 4X
then Girls = 5X
100 girls leave the school
Then Girls = 5X - 100
New Ratio = 4x : (5X - 100)
New Ratio = 6 : 7
=> 4X/ (5X - 100) = 6/7
=> 28x = 30x - 600
=> 2x =600
=> x = 300
=> 4x = 1200
boys in the school = 1200
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