RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 23 of MCQ

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23

Mark the correct alternative in the following:

For a binomial variate X, if n = 3 and P (X = 1) = 8 P(X = 3), then p =


Given:


n=3


P (X = 1) = 8 P (X = 3)


P =?


P(x=r)= nCr pr qn-r


P(x=1)= nC1 p1 qn-1


=3pq2 (1)


P(x=3)= 3C3 p3 q0


= p3(2)


Put values in the equations ,we have:


3pq2 =8 p3


3 (1-p)2 = 8p2


3+3p2-6p = 6p2


5p2+6p-3=0





Chapter Exercises

Exercise 33.2
Exercise 33.1
Very Short Answer
MCQ

More Exercise Questions

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8

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11

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12

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17

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19

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20

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21

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22

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23

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24

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27

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28

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29

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30

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