[" 25.Find the angle between the line "bar(r)=(i+2j-k)+lambda(i-j+k)" and the probability of getting head when "],[26." Abox contains "N" coins,of which "m" are farn bilased.The prois drawn from the box at random "],[" fair coin is toosed is "(1)/(2)," while it is "(2)/(3)" when "" bilased coin is tossed.A coin is drawn from the box at random "],[" and is tossed twice.The first time it shows head and the second time itshows tail.Find the probability that "],[" the coin drawn is fair."]