7. The value of $k$ such that $( x - 4 ) / 1 = ( y - 2 ) / 1 = ( z - k ) / 2$ lies in the plane $2 x - 4 y + z = 7$, is: (a) 7 (b) - 7 (c) no real value (d) 4
Let $A , B$, and $C$ be three events and $\bar { A } , \bar { B }$ and $\bar { C }$ be their corresponding complementary events. If the probabilities of the events $B , A \cap B \cap \bar { C }$ and $\bar { A } \cap B \cap \bar { C }$ are $\frac { 3 } { 4 } , \frac { 1 } { 3 }$ and $\frac { 1 } { 3 }$ respectively, then the eprobability of the event $B \cap C$ is
7. The value of $k$ such that $( x - 4 ) / 1 = ( y - 2 ) / 1 = ( z - k ) / 2$ lies in the plane $2 x - 4 y + z = 7$, is:\\
(a) 7\\
(b) - 7\\
(c) no real value\\
(d) 4\\