35
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It is 38.
42
It is: 26+37+42+43 = 148 and 148/4 = 37 which is the mean average
The prime numbers that are greater than 20 but less than 42 are 23, 29, 31, and 37. To find the average, add up these numbers (23 + 29 + 31 + 37) and divide by the total number of primes (4). The average is 30.
38, 40, 42, 44, 46, 48, 50, and 52.