Question

The coefficient of ax2+bx+c=0 are obtained by throwing a die find the probability that equation has real and equal roots?

Answer 1

Answer:

all possible outcome n(s) = {b^2 - 4ac >0 , b^2 - 4ac < 0 , b^2 - 4ac = 0}

n(s) = 3

Let a be the event of getting real and equal roots

favourable outcome of event a is

n(a) = 1

p(a) = number of favourable outcome of event a/

number of all possible outcome

=1/3