Q.

A random variable X takes the values – 2, -1, 1 and 2 with probabilities 1a4,1+2a4,12a4 and  1+a4 respectively then 

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

1a1

b

14a13

c

a can have any real value 

d

12a12

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

01a4101a401a3-3a1

01+2a4101+2a412a312a32 

012a41012a412a3-32a12

01+a4101+a40a3therefore   a12,12

 

 

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
A random variable X takes the values – 2, -1, 1 and 2 with probabilities 1−a4,1+2a4,1−2a4 and  1+a4 respectively then