The answer is: " 34 kg " .
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Explanation:
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15% of 60 kg = 15/100 * 60 = 0.15 * 60 = 9.00 = 9.
9 kg are bad (and presumably, cannot be sold. So we have:
60 kg minus 9 kg = 51 kg.
The remainder is "51 kg".
"(1/3)" of this remaining are too small too be sold.
(1/3) * 51 = 51 kg / 3 = 17 kg.
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So, subtract "17 kg" from the "remainder" :
51 kg − 17 kg = 34 kg .
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We have "34 kg of potatoes that can be sold" .
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