A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of success is

  • Option 1)

    8/3

  • Option 2)

    3/8

  • Option 3)

    4/5

  • Option 4)

    5/4

 

Answers (1)

As we learnt in

Binomial Distribution(Statistical) -

Mean = np

Variance = npq

Standard \: deviation =\sqrt{npq}

-

 

 Variance = npq

here, n =5

p=\frac{1}{2}

q=\frac{1}{2}

Thus, variance =5\times\frac{1}{2}\times\frac{1}{2}=\frac{5}{4}


Option 1)

8/3

Incorrect option    

Option 2)

3/8

Incorrect option    

Option 3)

4/5

Incorrect option    

Option 4)

5/4

Correct option    

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Knockout JEE Main April 2021 (Subscription)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Buy Now
Knockout JEE Main April 2021

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout JEE Main April 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-
Buy Now
Knockout JEE Main January 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions