Question

The probability of choosing an integer k from the set {1,2,3,....9} such that the equation x²+5x+k =0 has real roots is​

Answer 1

Answer:

x2+4x+c=0

For roots to be real

0≥0

16−4c≥c

4≥c

∴{1,2,3,4}

∴ Probability =94