In a friendship gang Kala has 11 gang, in how many ways can he invite one or more of the gang to his house?
Choose the correct choice from the following.
A) 1244 B) 2047 C) 3698 D) 5789 E) 78895
Kala can select one or more than one of his 8 gang.   =&gt; Required number of ways = 2^11 – 1= 2047.   2047
<result>B</result>
In a friendship gang Kala has 11 gang, in how many ways can he invite one or more of the gang to his house?