For each 6-month period during a light bulb's life span, the odds of it not burning out from over-use are half what they were in the previous 6-month period. If the odds of a light bulb burning out during the first 6-month period following its purchase are 1/8, what are the odds of it burning out during the period from 6months to 1 year following its purchase?
Choose the correct choice from the following choices
A) 5/27	B) 2/9	C) 1/2	D) 4/9	E) 2/3
P(of not burning out in a six mnth period)=1/2 of P(of not burning out in prev 6 mnth period)   P(of burning out in 1st 6 mnth)= 1/8   ---&gt;P( of not burning out in 1st 6 mnth)=1-1/8=7/8   ----&gt;P(of not burning out in a six mnth period)=1/2 *7/8=4/9   ---&gt;P(of burning out in a six mnth period)=1-4/9=4/7   now   P( of burning out in 2nd six mnth period)=P( of not burning out in 1st six mnth)*P(of burning out in a six mnth)   =7/8 *4/7 =1/2   Ans 1/2
<result>C</result>
For each 6-month period during a light bulb's life span, the odds of it not burning out from over-use are half what they were in the previous 6-month period. If the odds of a light bulb burning out during the first 6-month period following its purchase are 1/8, what are the odds of it burning out during the period from 6months to 1 year following its purchase?