$P(X = x) = k(x + 1)$ for $x = 0, 1, 2, 3$ , and 0 otherwise. What is $k$ ?

- \frac{9}{10}

Correct answerYour answer

\frac{1}{10}

Correct answerYour answer

\frac{1}{6}

Correct answerYour answer

\frac{1}{4}

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

Worth noting

$\frac{1}{6}$ adds $0 + 1 + 2 + 3$ , using $kx$ instead of $k(x + 1)$ .

Ten questions from Random Variables, Expectation & Variance, at your own pace.

Ten questions from Random Variables, Expectation & Variance, at your own pace.

P(X=x)=k(x+1)P(X = x) = k(x + 1)P(X=x)=k(x+1) for x=0,1,2,3x = 0, 1, 2, 3x=0,1,2,3, and 0 otherwise. What is kkk?