Find the probability that a number selected from the number 30 to 50 inclusive is a prime
1/4
5/21
2/7
3/10
1/3
Correct answer is B
30 (31) 32 33 34 35 36 (37) 38 39 40 (41) 42 (43) 44 45 46 (47) 48 49 50 prob = 5/21
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