Erfana Beevee Binte Hassan Shariff's answer to Stressful's Secondary 4 E Maths Singapore question.
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P(win in first race and lose in 2nd)=0.8x0.2=0.16
P(win first 3races) =0.8 x 0.8 x0.8=0.512
P(takes part in race for n weeks)
= P(wins in every race for n weeks)
= 0.8^n
P(lose race in 1st week) or p(win in first week and lose in 2nd week)
=0.2+ 0.8x0.2
=0.2+0.16
=0.36
P(win first 3races) =0.8 x 0.8 x0.8=0.512
P(takes part in race for n weeks)
= P(wins in every race for n weeks)
= 0.8^n
P(lose race in 1st week) or p(win in first week and lose in 2nd week)
=0.2+ 0.8x0.2
=0.2+0.16
=0.36
Date Posted:
8 months ago
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