gmatgeek wrote:

If a farmer sells 15 of his chickens, his stock of feed will

last for 4 more days than planned, but if he buys 20

more chickens, he will run out of feed 3 days earlier

than planned. If no chickens are sold or bought, the

farmer will be exactly on schedule. How many chickens

does the farmer have?

12

24

48

55

60

Say farmer has n chicken and he is good for d days.:-

We have 3 equations given in question:-

(n-15) * d+4 =(n+20) *(d-3) = n * d

Solving these: (You can solve 1st and 3rd and 2nd and 3rd together)

We get:

20d-3n=60

4n-15d =60

=> n=60

Ans E it is!

_________________

Lets Kudos!!!

Black Friday Debrief