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Suppose E(1), E(2), E(3) be three mutua...

Suppose `E_(1), E_(2), E_(3)` be three mutually exclusive events such that `P(E_(i))=p_(i)" for " i=1, 2, 3`
If `p_(1), p_(2), p_(3)` are the roots of `27x^(3) -27x^(2)+ax-1=0` the value of a is -

A

9

B

6

C

3

D

12

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The correct Answer is:
A
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