# A man sells 12 articles for Rs. 80 gaining 33 1/3%. Find the number of articles bought by the man for Rs. 90. - Mathematics

Sum

A man sells 12 articles for Rs. 80 gaining 33 1/3%. Find the number of articles bought by the man for Rs. 90.

#### Solution

S.P. of 12 articles = Rs.80,

Gain =33 1/3%=100/3%

C.P. =100/((100+"Gain"))xx"S.P."

=100/(100+100/3)xx80=100/((300+100)/3)xx80

=100/(400/3)xx80=100xx3/400xx80="Rs."60

Rs.60 is the cost of 12 articles

Rs. 1 is the cost of =12/60 article

Rs.90 is the cost of =12/60xx90

=1/5xx90=18

Man can buy an article for Rs.90 = 18

Concept: Concept of Discount
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 8 Profit, Loss and Discount
Exercise 8 (C) | Q 3 | Page 95