gaokao 2023 Q9

gaokao · China · national-A-science 5 marks Combinations & Selection Selection with Group/Category Constraints

Five volunteers participate in community service over Saturday and Sunday. Each day, two people are randomly selected from them to participate. The number of ways to select such that exactly one person participates on both days is
A. $120$
B. $60$
C. $40$
D. $30$

Five volunteers participate in community service over Saturday and Sunday. Each day, two people are randomly selected from them to participate. The number of ways to select such that exactly one person participates on both days is

A. $120$

B. $60$

C. $40$

D. $30$

Paper Questions

Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q20 Q21 Q22 Q23