Suppose \( E_{1}, E_{2} \) and \( \mathrm{E}_{3} \) be three mutual... VIDEO
Suppose \( E_{1}, E_{2} \) and \( \mathrm{E}_{3} \) be three mutually exclusive events
\( \mathrm{P} \) such that \( \mathrm{P}(\mathrm{Ei})= \) pi for \( i=1,2,3 \).
W
If \( p_{1}, p_{2} \) and \( p_{3} \) are the roots of \( 27 x^{3}-27 x^{2}+a x-1=0 \), the value of \( a \) is
(1) 3
(2) 6
(3) 9
(4) 12
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