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Find the probability that a number selected from the number 30 to 50 inclusive is...

Mathematics
WAEC 1994
Find the probability that a number selected from the number 30 to 50 inclusive is a prime
  • A. 1/4
  • B. 5/21
  • C. 2/7
  • D. 3/10
  • E. 1/3
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Correct Answer: Option B
Explanation
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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