Question : What is the average of all prime numbers between 30 and 50?
Option 1: 36.5
Option 2: 39.8
Option 3: 38.5
Option 4: 34.2
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Correct Answer: 39.8
Solution :
Prime numbers between 30 and 50 are 31, 37, 41, 43, and 47.
Required average = $\frac{31 + 37 + 41 + 43 + 47}{5}$ = 39.8
Hence, the correct answer is 39.8.
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