The average salary of four employees is 250Rs.per month. If one employee earns 120 and other earns 50 rupees and yet another employee earns 100rs. What is the amount earned by the fourth person?
a)700
b)600
c)730
d)620
e)540

• amount earned by the fourth person = 4*250 -(120+50+100) = 1000-270= 730 Rs
  
  so option c)
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