A sample of 40 farmers comprises of 25 adopters and 15 non-adopters of organic fertilizer. Also 15 the adopters grow cowpea, while 7 of the non-adopters grow rice. Determine the probability that the first person interviewed was either a non-adopter or someone that grow cowpea
"P=\\frac{15}{40}+\\frac{15}{40}=\\frac{30}{40}=\\frac{3}{4}"
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