Question

18If the price of an article increases by 49% and the sale
of that article decreases by 21%, then what is the
approximate effect on collection?
A) 15% decrease
B) 18% increase
C) 21% decrease
D) 28% increase​

Answer 1

Answer:

49-21+(49×-21) /100

28+(-1029) /100

1001/100=10.01

Answer 2

Given :- If the price of an article increases by 49% and the sale of that article decreases by 21%, then what is the

approximate effect on collection ?

A) 15% decrease

B) 18% increase

C) 21% decrease

D) 28% increase

Solution :-

Let us assume that, Price of the article is Rs.100 and total 100 articles were sold .

so,

→ Price * sales = collection. .

→ 100 * 100 = 10000

now,

→ New Price = 49% inc. = (149 * 100)/100 = Rs.149 .

→ New sale = 21% dec. = (79 * 100) / 100 = 79 articles .

then,

→ New collection = 149 * 79 = Rs.11,771

therefore,

→ Increased collection = 11771 - 10000 = Rs.1771 .

hence,

→ % inc. collection = (1771 * 100)/10000 = (1771/100) = 17.71 ≈ 18% . (B) (Ans.)

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