# Explain properly this question please

In this question they are saying,

There were 3 people,There names are A,B and C.then they are saying that A can finish his job in 12 days,B can finish in 15 days and C can on 20 days.A,B and C WORKED TOGETHER FOR 2 days to finish all of their job but C left . so they are asking how much time or days would A and B take to complete their all work

Solution:

Work is done by A in one day =151

By B=121

C=201

Together in 1 Day =151+121+201=604+5+3=6012=51

2 days work = 52

Remaining work = 1−52=53

one day work of A,B ⇒A+B=151+121=604+5=609=203

(A+B) work for t days = 203t=53

t=4 days

A and B will complete the work in 4 days.