Probability scores
0.25 2
0.2 3
0.25 7
0.1 9
0.05 11
0.05 12
0.1 14

find the expected value of the above random variable.

answer:

option a) , c) and d)

step-by-step explanation:

let us see every option one by one

a) (0.5)^2= 0.5 x 0.5 = 0.25

hence it is true

b) -0.2+(-0.05)

-0.20-0.05=-0.25 ≠ 0.25

hence false

c) |-3+2.75|

=|-3.00+2.75|

=|-0.25| = 0.25 as the mode of any negative number is positive

hence it also true

d) .25) = 0.25 and negative of any negative integer makes it a positive

hence it is also true

e) 2x-1.75x

= 0.25x

here though we have same coefficient but technically it is not a correct answer as we have an x with 0.25. hence it is false

77

step-by-step explanation: