On a shelf, the first row contains 25% more books than the second row, and the third row contains 25% less books than the second row. If the total number of books contained in all the three rows in 900, find the number of books in the first row.
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Answered by
14
let total no of books by
a,b and c = 125x+100x+75x
300x = 900 then x = 3
125x = 375
Answered by
14
Answer:
Step-by-step explanation:
let the number of books in second row be x.
1st row =25%+x =25/100+x =25+100x/100 = 125/100x
2nd row=25%-x
=25/100-x = 100-25x/100 = 75/100x
Total books = 900
900=75/100x + 125/100x + x
900= (75 +125+100)x/100
900=300/100x
x = 900*100/300
x = 300
1st row books = 125/100x
= 125/100 *300(cancel out)
=☺️375☺️Answer
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