12 of 19 Page 11 of 21 10. (8 marks 2+2+4) About 30% of human twins...

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12 of 19 Page 11 of 21 10. (8 marks 2+2+4) About 30% of human twins are identical, and the rest are fraternal. Identical twins are necessarily the same gender (half are male-male and the other half are female-female). One-quarter of fraternal twins are male- male, one-quarter female-female, and one-half are mixes: one male, one female. a. Name two, non-complementary, events related to this situation. b. Show this information on a tree diagram. c. You have just become a parent of twins and are told they are both girls. Given this information, what is the probability that they are identical? 12 of 19 Page 11 of 21 10. (8 marks 2+2+4) About 30% of human twins are identical, and the rest are fraternal. Identical twins are necessarily the same gender (half are male-male and the other half are female-female). One-quarter of fraternal twins are male- male, one-quarter female-female, and one-half are mixes: one male, one female. a. Name two, non-complementary, events related to this situation. b. Show this information on a tree diagram. c. You have just become a parent of twins and are told they are both girls. Given this information, what is the probability that they are identical?

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a Two noncomplementary events related to this situation a... View the full answer