Question

The probability distribution of a discrete r.v.X is as follows.

x	1	2	3	4	5	6
P(X = x)	k	2k	3k	4k	5k	6k

Complete the following activity.

Solution: Since `sum"p"_"i"` = 1

k = `square`

Answer 1

Since `sum"p"_"i"` = 1

k + 2k + 3k + 5k + 6k = 1

∴ 21k = 1

k = `1/21`