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A committee of 4 persons is to be formed...

A committee of 4 persons is to be formed from 2 ladies 2 old man and 4 youngmen such that it includes at least 1 lady, at least one old man and at most 2 youngmen. Then the total number of ways in which this committee can be formed is

A

40

B

41

C

16

D

32

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of forming a committee of 4 persons from 2 ladies, 2 old men, and 4 young men, with the conditions that there is at least 1 lady, at least 1 old man, and at most 2 young men, we can break it down into cases based on the number of young men included. ### Step-by-Step Solution: 1. **Identify the Variables**: - Ladies (L): 2 - Old Men (O): 2 - Young Men (Y): 4 2. **Define Cases Based on Young Men**: We can have two cases based on the number of young men: - Case 1: 2 Young Men - Case 2: 1 Young Man - Case 3: 0 Young Men (not applicable since we need at least 1 lady and 1 old man) 3. **Case 1: 1 Lady, 1 Old Man, 2 Young Men**: - Choose 1 lady from 2: \( \binom{2}{1} \) - Choose 1 old man from 2: \( \binom{2}{1} \) - Choose 2 young men from 4: \( \binom{4}{2} \) Calculation: \[ \text{Ways} = \binom{2}{1} \times \binom{2}{1} \times \binom{4}{2} = 2 \times 2 \times 6 = 24 \] 4. **Case 2: 1 Lady, 2 Old Men, 1 Young Man**: - Choose 1 lady from 2: \( \binom{2}{1} \) - Choose 2 old men from 2: \( \binom{2}{2} \) - Choose 1 young man from 4: \( \binom{4}{1} \) Calculation: \[ \text{Ways} = \binom{2}{1} \times \binom{2}{2} \times \binom{4}{1} = 2 \times 1 \times 4 = 8 \] 5. **Case 3: 2 Ladies, 1 Old Man, 1 Young Man**: - Choose 2 ladies from 2: \( \binom{2}{2} \) - Choose 1 old man from 2: \( \binom{2}{1} \) - Choose 1 young man from 4: \( \binom{4}{1} \) Calculation: \[ \text{Ways} = \binom{2}{2} \times \binom{2}{1} \times \binom{4}{1} = 1 \times 2 \times 4 = 8 \] 6. **Case 4: 2 Ladies, 2 Old Men, 0 Young Men**: - Choose 2 ladies from 2: \( \binom{2}{2} \) - Choose 2 old men from 2: \( \binom{2}{2} \) Calculation: \[ \text{Ways} = \binom{2}{2} \times \binom{2}{2} = 1 \times 1 = 1 \] 7. **Total Ways**: Now, we sum all the cases: \[ \text{Total} = 24 + 8 + 8 + 1 = 41 \] ### Final Answer: The total number of ways to form the committee is **41**.
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