Question

0.10% (0.9018 N IU 4-0.1U P/missing half of PCX Tlher next 10 shots ) To.001488) blems 8 through 12, consult the data in the following table regarding dragons found on Dragon Island. DRAGONS Number of heads Fire-breathing 89 Non Fire-breathing 8. If one of the 140 dragons is randomly selected, what is the probability it has two heads? (s points) 31 +0.221 140 9. Find the probability that a randomly selected dragon breathes fire. (5 points) P(breaths fire)=88+22+4/140=10.821 SIIS140 10. Find the probability that a randomly selected dragon either has three heads or doesn't breathe fire. (5 points) P13 reads or rohel P(3 heads) =11/140 non fire)=25/140 140+ 140 - 110 0.207 (3 reads & no fire) = 7/140 Find the probability that a randomly selected dragon has two heads given that it ceathes fire. (5 points) points dedor del mondo TV Find the probability that a randomly selected dragon doesn't breathe fire given tha four heads. (5 points)

Answer 1

11. P(2 heads / it is breathes fire) = P(2 heads and breathes fire) / P(breathes fire)
= (22/140) / (115/140) = 0.1913

12. P(doesn't breathe fire / 4 heads) = P(doesn't breathe fire and 4 heads) / P(4 heads)
= (6/140) / (0+6 /140) = 1