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Probability — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsProbability1 Mark
MCQ
A random variable $X$ has the following distribution.
$X$12345678
$P(X)$0.150.230.120.100.200.080.070.05

For the event $E=\{X$ is prime number $\}$, find $P(E)$.
  • A
    0.87
  • ✓
    0.62
  • C
    0.35
  • D
    0.5
✓

Answer

Correct option: B.
0.62
(b) : $P(E)=P(X=2)+P(X=3)+P(X=5)+P(X=7)$
$=0.23+0.12+0.20+0.07=0.62$

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