Solution:

If members are opposed, , and if members are in favour, .

As a result, the necessary probability distribution is,

ieret

is:

And is:

Then Variance,

In a meeting, of the members favour and oppose a certain proposal. A member is selected at random and we take if he opposed, and if he is in favour. Find and .

Solution:

If members are opposed, , and if members are in favour, .

As a result, the necessary probability distribution is,

ieret

is:

And is:

Then Variance,