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प्रश्न
A man bought a certain number of oranges; out of which 13 percent were found rotten. He gave 75% of the remaining in charity and still has 522 oranges left. Find how many had he bought?
उत्तर
Suppose number of oranges bought = 100
Number of Rotten oranges = 13
Remaining oranges = 100 - 13
Remaining oranges = 87
Oranges given in charity
= `(75 xx 87)/100`
= `(3 xx 87)/(4)`
= `(261)/(4)`
Net balance of oranges
= `87 - (261)/(4)`
= `(348 - 261)/(4)`
= `(87)/(4)`
If the balance is `(87)/(4)` then number of oranges bought = 100
If the balance is 1 then number of oranges bought = `100 xx (4)/(87)`
if the balance is 522 then number of oranges bought
= `100 xx (4)/(87)xx 522`
= `(100 xx 4 xx 522)/(87)`
= 100 x 4 x 6
= 2400
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