Page 110 - NUMINO Challenge_B2
P. 110
Problem solving
Key Points
1 30 students are competing in a spelling-bee. Find (10 9 2) games are
played in each group.
the total number of matches needed to
determine the winner, according to the rules
below.
Students are divided into 3 groups of 10.
Each group will play in a preliminary round, in a
league system.
The top 3 from each group will advance to the
second round.
In the second round, a tournament will be
played to determine the winner.
2 Four people, A, B, C, and D, played in a league. When there were no
Find D’s win-loss record. draws, the total
number of games
A: 2 wins and 1 loss
B: 0 wins and 3 losses total number of
C: 2 wins and 1 loss wins total number of
losses.
107Number of Outcomes
Key Points
1 30 students are competing in a spelling-bee. Find (10 9 2) games are
played in each group.
the total number of matches needed to
determine the winner, according to the rules
below.
Students are divided into 3 groups of 10.
Each group will play in a preliminary round, in a
league system.
The top 3 from each group will advance to the
second round.
In the second round, a tournament will be
played to determine the winner.
2 Four people, A, B, C, and D, played in a league. When there were no
Find D’s win-loss record. draws, the total
number of games
A: 2 wins and 1 loss
B: 0 wins and 3 losses total number of
C: 2 wins and 1 loss wins total number of
losses.
107Number of Outcomes
