Ten dancers A to J go to a dance competition. The following informatio...
Given Information:
- 10 dancers A to J
- 3 performances: Kathak, Bharatnatyam, and Folk
- Folk dance involves 3 to 5 people
- Each dancer performs only once
- Each dancer is part of exactly one group
- A, C, E, and F know Kathak
- B, E, G, and H know Bharatnatyam
- All except A and B know Folk dance
- C and D cannot dance together
- F and I have to dance together
Given Constraints:
- F is injured and E has to perform Kathak
Objective:
Find the number of ways a team can perform Folk dance.
Solution:
To find the number of ways a team can perform Folk dance, we need to consider the given constraints and find the possible combinations.
Step 1: Determine the dancers who can perform Folk dance
- All except A and B know Folk dance
- F is injured and E has to perform Kathak
- Since F is injured, we cannot include F in the Folk dance performance
- Since E has to perform Kathak, we cannot include E in the Folk dance performance
- Therefore, the dancers who can perform Folk dance are C, D, G, H, I, J
Step 2: Determine the number of dancers required for the Folk dance performance
- Folk dance involves 3 to 5 people
- Since the minimum number of dancers required is 3, we can select any 3 dancers from the pool of dancers who can perform Folk dance (C, D, G, H, I, J)
- The possible combinations of 3 dancers are:
- C, D, G
- C, D, H
- C, D, I
- C, D, J
- C, G, H
- C, G, I
- C, G, J
- C, H, I
- C, H, J
- C, I, J
- D, G, H
- D, G, I
- D, G, J
- D, H, I
- D, H, J
- D, I, J
- G, H, I
- G, H, J
- G, I, J
- H, I, J
- Therefore, there are 20 possible combinations of 3 dancers for the Folk dance performance.
Step 3: Determine the number of ways to assign the remaining dancers to Kathak and Bharatnatyam performances
- A, C, E, and F know Kathak
- B, E, G, and H know Bharatnatyam
- Since E has to perform Kathak, we cannot assign E to Bharatnatyam
- Therefore, the possible combinations for Kathak and Bharatnatyam are:
- Kathak: A, C, F
- Bharatnatyam: B, G, H
- Kathak: A, C, F
- Bharatnatyam: B, G, H
- Kathak: A, C, F