Question

The probability of choosing randomly a number 'C' from {1,2,.....9} such that the quadratic equation x²+4x+c=0 has real roots are

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Answer 1

Step-by-step explanation:

x

2

+4x+c=0

For roots to be real

0≥0

16−4c≥c

4≥c

∴{1,2,3,4}

∴ Probability = 4/9