AP Statistics · Topic 4.3

Introduction to Probability Practice

Part of Probability, Random Variables, and Probability Distributions.(VAR-4.A)

Practice questions

17

Want a predicted score for the whole AP STAT exam? Take the 20-question diagnostic and Lumi will plan the rest.

Take diagnosticarrow_forward Practice all 4.3

Sample questions

5 of 17 — sign in to practice the rest with adaptive difficulty and mastery tracking.

Sample 1difficulty 1/5
$A fair coin is flipped twice.$
$What is the probability of exactly one head?$
- A
  $0.50$
  check_circle
- B
  $0.25$
- C
  $1.00$
- D
  $0.75$
Why
$Outcomes: HH, HT, TH, TT. Two have exactly 1 head: 2/4 = 0.5.$
View full solution & statsarrow_forward
Sample 2difficulty 1/5
$A probability is always in$
- A
  $[0, 100]$
- B
  $Any real number$
- C
  $[-1, 1]$
- D
  $[0, 1]$
  check_circle
Why
$P(A) \in [0, 1].$
View full solution & statsarrow_forward
Sample 3difficulty 1/5
$A fair six-sided die is rolled.$
$What is P(rolling a number greater than 4)?$
- A
  $1/6$
- B
  $2/3$
- C
  $1/3$
  check_circle
- D
  $1/2$
Why
$Favorable: 5, 6 = 2 outcomes. P = 2/6 = 1/3.$
View full solution & statsarrow_forward
Sample 4difficulty 2/5
$Events A and B have P(A) = 0.5, P(B) = 0.4, P(A and B) = 0.2.$
$What is P(A or B)?$
- A
  $0.9$
- B
  $0.7$
  check_circle
- C
  $0.2$
- D
  $1.1$
Why
$P(A or B) = P(A) + P(B) - P(A and B) = 0.5 + 0.4 - 0.2 = 0.7.$
View full solution & statsarrow_forward
Sample 5difficulty 2/5
$Two cards drawn WITH replacement from a standard 52-card deck.$
$P(both hearts)?$
- A
  $1/8$
- B
  $1/4$
- C
  $13/52$
- D
  $1/16$
  check_circle
Why
$With replacement: (13/52)(13/52) = (1/4)^2 = 1/16.$
View full solution & statsarrow_forward

Predict my AP scorearrow_forward

auto_awesomeAll Tools question_answerHomework Q&A menu_bookAP & SAT Prep timelineLearn Mode