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The average of prime numbers between 20 and 40 is _____ .

A20

B30

C25

D35

Answer:

B. 30

Read Explanation:

23,29,31,37 average= (23 + 29 + 31 + 37)/4 = 120/4 = 30


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Average of 75 numbers are 44. When 5 more numbers are included, the average of 80 numbers become 46. Find the average of 5 numbers.
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