A random variable X has its range X - 3- 2- 1 with the probabilities- 12-13 and 16 respectively- The mean value of X is

The correct option is B 73 Mean=np =(3.12)+(2.13)+16 =136+16 =146 =73 ...

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Probability Distribution

A random vari...

Question

A random variable X has its range $X = {3, 2, 1}$ with the probabilities,
$\frac{1}{2}, \frac{1}{3}$ and $\frac{1}{6}$ respectively. The mean value of X is

\frac{5}{3}

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\frac{7}{3}

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3

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4

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Solution

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Similar questions

1, 2, 3

P (X = 1) = K, P (X = 2) = 2 K, P (X = 3) = 3 K,

X

X = 0, 1, 2

P (X = 0) = 3 K^{3}, P (X = 1) = 4 K - 10 K^{2}, P (X = 2) = 5 K - 1

K

X

$X = x$	$0$	$1$	$2$	$3$	$4$	$5$	$6$	$7$
$P (X = x)$	$0$	$k$	$2 k$	$2 k$	$3 k$	$k^{2}$	$2 k^{2}$	$7 k^{2} + k$

k

P (0 < X < 5)

f (x) = 3 x + 2

$X = x$	$1$	$2$	$3$	$4$
$P (X = x)$	$1_{/ 6}$	$1_{/ 3}$	$1_{/ 3}$	$1_{/ 6}$

0

1

\frac{2}{3}

\frac{1}{3}

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