In a colony the municipality decided to number the houses and the shops. They want to number the shops with the numbers containing 3 between 1-100. The houses are 10-20 floored and at the back of the houses 8 feet is left for fire exit. How many shops can be numbered?  Choose the correct answer
A) 19	B) 20	C) 21	D) 22	E) 23
3numbers containing 3   ---&gt;3,13,23,... = 10 numbers   ----&gt;30,31,32... = 10 numbers   total = 20 -1= 
<gadget id="calculator">20 -1</gadget>
<output>19</output>
19   19NSWER:19
<result>A</result>
In a colony the municipality decided to number the houses and the shops. They want to number the shops with the numbers containing 3 between 1-100. The houses are 10-20 floored and at the back of the houses 8 feet is left for fire exit. How many shops can be numbered?