a. After having a sonogram, a pregnant woman learns that she will have twins. Wh

Question

a. After having a sonogram, a pregnant woman learns that she will have twins. What is the probability that she will have identical twins? The probability is (Type an integer or a simplified fraction.) b. After studying the sonogram more closely, the physician tells the pregnant woman that she will give birth to twin boys. What is the probability that she will have identical twins? That is, find the probability of identical twins given that the twins consist of two boys. The probability is (Type an integer or a simplified fraction.)

Explanation / Answer

Answer

Here the sexes of twins and and the type of twins are given in the table with corresponding weightage.

a) Now from the table we have after knowing that there are twins, the probability that the woman will have identical twins

=4/28=1/7

b) Now after studying the sonogra more closely, the physician tells that she will give birth of twin boys ( it is given condition) . SO then,

P(It will be identical twins | she will give birth of twin boys)

=2/8 =1/4

Hence the answer.............

Thank you..........

Sexes of Twins Total boy/boy boy/girl girl/boy girl/girl Identical Twins 2 0 0 2 4 Fraternal Twins 6 6 6 6 24 Total 8 6 6 8 28

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.