Question:

The frequency distribution table shows the number of mango trees in a grove and their yield of mangoes. Find the median of the data: 

No. of MangoesNo. of Trees (f)
50 – 10033
100 – 15030
150 – 20090
200 – 25080
250 – 30017

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To find the median of grouped data, locate the median class where cumulative frequency ≥ \(N/2\), then apply \[ \text{Median} = L + \frac{(N/2 - c.f.)}{f} \times h \]
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Solution and Explanation

Step 1: Find the cumulative frequency (c.f.). 

Class IntervalFrequency (f)Cumulative Frequency (c.f.)
50 - 1003333
100 - 1503063
150 - 20090153
200 - 25080233
250 - 30017250


Step 2: Find total frequency. 
N = 250 

Step 3: Find median class. 
N/2 = 250 / 2 = 125 
The c.f. just greater than 125 is 153. Hence, the median class is 150 - 200

Step 4: Apply the median formula. 
Median = L + ((N/2 - c.f.) / f) × h 

Where: 
L = 150, N = 250, c.f. = 63, f = 90, h = 50 

Substitute the values: 
Median = 150 + ((125 - 63) / 90) × 50 
= 150 + (62 / 90 × 50) 
= 150 + 34.44 = 184.44 

Step 5: Conclusion. 
The median number of mangoes produced per tree is approximately 184.4

Final Answer: Median = 184.4

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