A is targeting to $\mathrm { B } , \mathrm { B }$ and C are targeting to A . Probability of hitting the target by $\mathrm { A } , \mathrm { B }$ and C are $2 / 3,1 / 2$ and $1 / 3$ respectively. If A is hit then find the probability that B hits the target and C does not.
The line $\frac { x - 4 } { 1 } = \frac { y - 2 } { 1 } = \frac { z - k } { 2 }$ lies completely in the plane $2 x - 4 y + z = 7$ for
A is targeting to $\mathrm { B } , \mathrm { B }$ and C are targeting to A . Probability of hitting the target by $\mathrm { A } , \mathrm { B }$ and C are $2 / 3,1 / 2$ and $1 / 3$ respectively. If A is hit then find the probability that B hits the target and C does not.