Answer:
(a) 0.088
(b) 0.76
(c) C. ​No, this is not unusual because the probability is not less than or equal to 0.05
Explanation:
Part (a)
We know that 37% of all infants born were conceived Through IVF and from those 24% resulted in multiple births. Then, the probability that a randomly selected infant was conceived through IVF and was part of multiple births is equal to the multiplication of these percentages, so
P = 0.37 x 0.24 = 0.088
Part (b)
If 24% of infants conceived through IVF are part of multiple births, the complement is the percentage of infants conceived through IVF that are not part of multiple births. So, the answer is
P = 1 - 0.24 = 0.76
Part (c)
Finally, we can consider something unusual when the probability is small. Since the probability that a randomly selected infant is conceived through IVF and to was part of multiple​ births is 0.088 and 0.088 is greater than 0.05, we can say that the answer is:
C. ​No, this is not unusual because the probability is not less than or equal to 0.05
So, the answers are
(a) 0.088
(b) 0.76
(c) C. ​No, this is not unusual because the probability is not less than or equal to 0.05