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Study the following information carefully to answer the questions that follows
A committee of few members to be formed out of 7 males and 5 females
If the committee of 3 members having atleast 1 female

A

105

B

195

C

240

D

185

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The correct Answer is:
To solve the problem of forming a committee of 3 members from 7 males and 5 females with the condition that there is at least 1 female, we can break down the solution into several steps. ### Step-by-Step Solution: 1. **Understanding the Conditions**: We need to form a committee of 3 members that includes at least 1 female. This means we can have the following combinations: - 1 female and 2 males - 2 females and 1 male - 3 females 2. **Calculating Each Case**: - **Case 1: 1 Female and 2 Males**: - The number of ways to choose 1 female from 5: \[ \text{Number of ways} = \binom{5}{1} = 5 \] - The number of ways to choose 2 males from 7: \[ \text{Number of ways} = \binom{7}{2} = \frac{7 \times 6}{2 \times 1} = 21 \] - Total ways for this case: \[ \text{Total} = 5 \times 21 = 105 \] - **Case 2: 2 Females and 1 Male**: - The number of ways to choose 2 females from 5: \[ \text{Number of ways} = \binom{5}{2} = \frac{5 \times 4}{2 \times 1} = 10 \] - The number of ways to choose 1 male from 7: \[ \text{Number of ways} = \binom{7}{1} = 7 \] - Total ways for this case: \[ \text{Total} = 10 \times 7 = 70 \] - **Case 3: 3 Females**: - The number of ways to choose 3 females from 5: \[ \text{Number of ways} = \binom{5}{3} = \frac{5 \times 4 \times 3}{3 \times 2 \times 1} = 10 \] 3. **Adding All Cases Together**: Now, we add the total number of ways from all cases: \[ \text{Total ways} = 105 + 70 + 10 = 185 \] ### Final Answer: The total number of ways to form a committee of 3 members with at least 1 female is **185**.
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