00:01
Here the given demand function is dp equals to minus 3p plus 247.
00:16
Therefore, if we differentiate this with respect to p, dd dp will be minus 3.
00:25
So, elastically elasticity of demand e equals to minus dd by dp multiplied by p divided by d.
00:45
That is e is equal to minus of minus 3 multiplied by p by minus 3p plus 247.
00:58
That is equals to 3p divided by 247 minus 3p.
01:04
Now, for the solution of a, we have to find out e at p is equal to 36 dollars.
01:14
So, p at p is equal to 36 dollars, e will be 3 multiplied by 36 divided by 247 minus 36 multiplied by 3.
01:27
That is equals to 108 divided by 139.
01:31
That is equals to 0 .777 because we had to round this off up to three decimal places...