Solve this question via formula: [E(X)^2-(EX)^2].
I have tried several times but answer is not coming.
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Mine is coming to option c only approx idk why A ? They have not provided why A ?
Its option a,
the method to do this is
for E(X)^2= 0.05*(1.25^2)+0.1*(1.3^2)+……….. and so on=1.8238
(EX)^2=(0.05*1.25+0.1*1.3+……………)^2=1.8225
therefore 1.8238-1.8225=0.0013
square root 0.0013=0.0354
Pls try by the following method and confirm the answer
Yes, answer will be A by another method. My question was by 2nd method answer was not coming.
Okay….what is the method 2 ?
I will post audio of this question by another method through calci
Please go through the audio