We have total 100 rs and we need to buy exactly 100 birds. The prizelist for birds is as follow:
1) 1 parrot = 5 rs
2) 1 craw = 1 rs
3) 20 sparrows = 1 rs
But you have to follow these conditions
-> you have to spent all 100 rs.
-> you have to buy exact 100 birds
-> you have to buy all three birds. That mean you cant buy any specific kind of bird. So you must have all three kind of bird when you finish the buying!!!!


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Answer

80 sparrows, 19 parrots and 1 crow
80 sparrows cost = Rs. 4
19 parrots cost = Rs.95
1 crow cost = Rs. 1

Dear Mr. Rahul

your answer is wrong because you have bought crow which is not in your buying list (parrot, craw,sparrows)

correct the answer (Question phrase)

Oh stop nitpicking!
I'd be more interested in the equation

Let me try ..

Say
parrots : x
Crow/ Craw : y
Sparrows : z

then ..
x+y+z = 100

Money spent
x * 5 + y * 1 + z/20 * 1 = 100

Now we have 3 variables and 2 equations .. We need one more equation for solution ..

Though x > 0 , y > 0 and z >0 .. We cannot say x+ y + z >0 ..

I think i m missing something .. But anyways, as its my habit to solve without complete data.. i will go ahead
100x + 20y + z = 2000
100x + 20y + (100 - x - y ) = 2000
99 x + 19 y = 1900
99 x = 19 (100 - y)

or

99/19 * x = 100 - y

Guessing it .. As x >0 and y >0 .. Also x,y,z are complete numbers (not fractions) .. The least possible value to make left side a whole number is "19" ..

Considering x = 19 ... y will be 1 ...

So placing ..
x + y + z = 100 ...
19 + 1 + z = 100
z = 80 ..


So first possibility is ..
19 Parrots , 1 Crow , 80 Sparrows


Now again ..if consider x = 38 , then y will be a negative number ... Similarly for all x > 19 , y will be negative .. So x = 19 is the only option that satisfies this equation ..



And Rahul bhai is RIGHT !!

Main 2 equations pe aake atak gayi thi.....

Tussi great ho Hemant Sa