How many positive integers less than 300 can be formed using the numbers 1, 2, 3 a for the digits?
Choose the correct choice from the following options
A) 30  B) 52  C) 66  D) 68  E) 84
Notice that we can find the number of 2 and 3 digit numbers by just assuming the first digit can also be zero:   0 1 1   1 2 2   2 3 3   Number of possibilities = 3*3*3= 
<gadget id="calculator">3*3*3</gadget>
<output>27</output>
27.   Then, just add up the number of 1 digits numbers= 3, so total is  27+3= 
<gadget id="calculator"> 27+3</gadget>
<output>30</output>
30.   30nswer: 30
<result>A</result>
How many positive integers less than 300 can be formed using the numbers 1, 2, 3 a for the digits?