Given:P(H)=P(T)=1/2P(H)= H1Tn-1+H2Tn-2+H3Tn-3+…..+Hn-1T1+HnRequired probability = p= 1- P0.8For n= 2For n=3So, n=3

Q. 245.0( 1 Vote )

Mark the correct A. 2

B.3

C. 4

D. 5

Answer :

Given:

P(H)=P(T)=1/2

P(H)= H¹T^n-1+H²T^n-2+H³T^n-3+…..+H^n-1T¹+Hⁿ

Required probability = p= 1-

P0.8

For n= 2

For n=3

So, n=3

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