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Solution


Q.

The probability distribution of a random variable X is given below :

X 4k 30/7 k 32/7 k 34/7 k 36/7 k 38/7 k 40/7 k 6k
P(X) 2/15 1/15 2/15 1/5 1/15 2/15 1/5 1/15

 

If E(X) =26315 then P(X < 20) is equal to :    [2026]
1 815  
2 1115  
3 35  
4 1415  

Ans.

(2)