If the three lines p1x + q1y = 1, p2x + q2y = 1 and p3x + q3y = 1 are concurrent, then the points (p1, q1 ), (p2, q2 ) and (p3, q3 ) are
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dairy sold 65 / 850 ml. 73/ 760 ml and 84 / 90 ml of milk during three consecutive days of a cert week. What was the total sale of milk from this dairy
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