Birth certificates show that approximately 9 of all births

Last updated: 4/30/2023

Birth certificates show that approximately 9 of all births in the United States are to teen mothers ages 15 to 19 24 to young adult mothers age 20 to 24 and the remaining 67 to adult mothers age 25 to 44 An extensive survey of live births examined pregnancy type defining an unintended pregnancy as one that was unwanted or mistimed by at least two years The survey found that only 23 of births to teen mothers are intended and 77 are unintended Among births to young adult women age 20 24 30 are intended and at ages 25 44 75 are intended The tree diagram of this information is shown Teen Young Adult or Adult P teen P unintended 0 09 0 24 P unintended teen P teen and unintended P teen unintended Intended or Unintended 0 0207 0 23 1 0 25 U 0 1675 a Use the information provided in the tree diagram to obtain the following probabiliti s Enter your answer as a percentage rounded to one decimal place 0 77 U 0 50 1 YA 0 67 A 0 751 P teen unintended OP unintended teen P unintended and teen 0 0693 0 1200 0 50 U 0 1200 0 5025 b The appropriate notation for the probability that an unintended birth was to a teen mother is