1) A small firm employs nine workers. The wages it pays to these workers are $200, $220, $280, $300, $310, 320, $330, $350 and $390 a week. What is the average wage paid?

solution :
sum of dollar =200+220+280+300+310+320+330+
350+390
Now,
average =total sum of all dollar
total sum of worker
=2370
9
=263.333#