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i. Mean = a (3 median - mode) II. Mean...

i. Mean = a (3 median - mode)
II. Mean - Mode = b(Mean - Median)
(iii) Median = Mode + c (Mean - mode)

A

`a lt c lt b`

B

`a lt b lt c`

C

`b lt c lt a`

D

`c lt a lt b`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to establish the relationships between the constants \( a \), \( b \), and \( c \) based on the given equations involving mean, median, and mode. ### Step-by-Step Solution: 1. **Understanding the Standard Relation**: The standard relation between mean, median, and mode is given by: \[ 3 \times \text{Median} = \text{Mode} + 2 \times \text{Mean} \] This will be our reference point for deriving the values of \( a \), \( b \), and \( c \). 2. **Finding \( a \)**: The first equation given is: \[ \text{Mean} = a \times (3 \times \text{Median} - \text{Mode}) \] From the standard relation, we can rearrange it to express Mean: \[ 2 \times \text{Mean} = 3 \times \text{Median} - \text{Mode} \] Dividing both sides by 2 gives: \[ \text{Mean} = \frac{1}{2} \times (3 \times \text{Median} - \text{Mode}) \] Thus, we can conclude: \[ a = \frac{1}{2} \] 3. **Finding \( b \)**: The second equation given is: \[ \text{Mean} - \text{Mode} = b \times (\text{Mean} - \text{Median}) \] Rearranging the standard relation, we have: \[ 3 \times \text{Median} - \text{Mean} = \text{Mode} - \text{Mean} \] Multiplying both sides by -1 gives: \[ \text{Mean} - \text{Mode} = 3 \times (\text{Mean} - \text{Median}) \] Therefore, we can conclude: \[ b = 3 \] 4. **Finding \( c \)**: The third equation given is: \[ \text{Median} = \text{Mode} + c \times (\text{Mean} - \text{Mode}) \] From the standard relation, we can express Median as: \[ \text{Median} = \frac{1}{3} \times \text{Mode} + \frac{2}{3} \times \text{Mean} \] Rearranging gives: \[ \text{Median} = \text{Mode} - \frac{2}{3} \times \text{Mode} + \frac{2}{3} \times \text{Mean} \] This implies: \[ c = \frac{2}{3} \] 5. **Establishing the Inequality**: Now we have: \[ a = \frac{1}{2}, \quad b = 3, \quad c = \frac{2}{3} \] We can compare these values: \[ \frac{1}{2} < \frac{2}{3} < 3 \] Hence, we conclude: \[ a < c < b \] ### Final Result: The relationships between \( a \), \( b \), and \( c \) are: \[ a < c < b \]
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