A.13 nước
B.14 nước
C.15 nước
D.16 nước

A.\(247.\)B. \(248.\)C. \(229.\)D. \(290.\)
B.
C.
D.

A.\(3.\)B. \(5.\)C. \(6.\)D. \(4.\)
B.
C.
D.

A.\(\dfrac{{x + 1}}{1} = \dfrac{{y - 3}}{{ - \,2}} = \dfrac{{z + 1}}{2}.\)B. \(\dfrac{{x + 1}}{1} = \dfrac{{y - 8}}{{ - \,2}} = \dfrac{{z - 4}}{2}.\)C. \(\dfrac{{x + \dfrac{1}{3}}}{1} = \dfrac{{y - \dfrac{5}{3}}}{{ - \,2}} = \dfrac{{z - \dfrac{{11}}{6}}}{2}.\)D. \(\dfrac{{x + \dfrac{2}{9}}}{1} = \dfrac{{y - \dfrac{2}{9}}}{{ - \,2}} = \dfrac{{z + \dfrac{5}{9}}}{2}.\)
B.
C.
D.

A.\(\dfrac{7}{6}.\)B. \(\dfrac{{11}}{{12}}.\)C. \(\dfrac{2}{3}.\)D. \(\dfrac{5}{6}.\)
B.
C.
D.

A.\(P = 10.\)B. \(P = 4.\)C. \(P = 6.\)D. \(P = 8.\)
B.
C.
D.

A.\(\dfrac{{6\sqrt {13} }}{{65}}.\)B. \(\dfrac{{\sqrt {13} }}{{65}}.\)C. \(\dfrac{{17\sqrt {13} }}{{65}}.\)D. \(\dfrac{{18\sqrt {63} }}{{65}}.\)
B.
C.
D.

A.\(5.\)B. \(7.\)C. \(6.\)D. \(8.\)
B.
C.
D.

A.\(\dfrac{{11}}{{630}}.\)B. \(\dfrac{1}{{126}}.\)C. \(\dfrac{1}{{105}}.\)D. \(\dfrac{1}{{42}}.\)
B.
C.
D.

A.\(\dfrac{7}{5}.\)B. \(1.\)C. \(\dfrac{7}{4}.\)D. \(4.\)
B.
C.
D.