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Start learning 50% faster. Sign in nowLet the number of pens be 4a, 6a and 5a Then, we have LCM of (4a, 6a, 5a) = a times; LCM(4, 6, 5) = 60a rArr; 60a = 360 rArr; a = 6 rArr; No. of pens are 24, 36, 30 there4; The sum is 36 + 24 = 60
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