For binomial distribution with mean 20 and Standard deviation 4 , number of trials are

  • Option 1)

    20

  • Option 2)

    50

  • Option 3)

    100

  • Option 4)

    None

 

Answers (1)

 

Random Experiment -

If an experiment is performed many times under similar conditions and the outcome of each time is not the same, then this experiment is called a random experiment.

Example : Tossing of a fair coin.

-

 

 we know that mean = nP

and standard deviation =\sqrt{nPq}

given that 

\\nP = 2D \\ nPq=16 \\ q=\frac{16}{20}=\frac{4}{5} \\ P= 1-\frac{4}{5}=\frac{1}{5} \\ \therefore n=100

 


Option 1)

20

This option is incorrect

Option 2)

50

This option is incorrect

Option 3)

100

This option is correct

Option 4)

None

This option is incorrect

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