Question

If 3 men or 4 women can earn Rs.960 in a day, how much would 6 men and 11 women earn in a day?

Answer 1

given $3$ men or $4$ women can earn $960$ in a day

therefore $1$ men can earn $960/3=320$ and 1 women can earn $960/4=240$ per day

now $6$ men and $11$ women can earn $6\times \left(320\right)+11\times \left(240\right)=4560$ per $1$ day

[since each men can earn $320$ and each women can earn $240$ per $1$ day.