Conditional probability and two-way tables
Probability and inference · Stage 3
Recognize the pattern
After “given,” use only that subgroup as the denominator.
Useful ruleP(A|B)=P(A∩B)/P(B)
Build on: PSD-09
Try it before reading the solution
Of 20 students, 8 play soccer; 3 of those 8 play tennis. Find P(tennis | soccer).
This teaching example is original and is not an official SAT question.
Reasoning
Among the 8 soccer players, 3 also play tennis.
Answer3/8
03 · Next step
See membership →Ready for adaptive practice
Practice questions remain in English, as on the SAT.