JEE Math Practice Question
The coefficients a, b and c of the quadratic equation, ax2 + bx + c = 0 are obtained by throwing a dice three times. The probability that this equation has equal roots is :
- A.$${1 \over {72}}$$
- B.$${5 \over {216}}$$
- C.$${1 \over {36}}$$
- D.$${1 \over {54}}$$
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