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Probability question

2021 · 25 Feb · Shift 1 · Q35
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  5. /2021 · 25 Feb · Shift 1 · Q35

Probability question

2021 · 25 Feb · Shift 1 · Q35

JEE MainMathematicsProbabilityMCQ+4 / −1
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 :
  1. A
    172{1 \over {72}}721​
  2. B
    5216{5 \over {216}}2165​
  3. C
    136{1 \over {36}}361​
  4. D
    154{1 \over {54}}541​
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