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Question Bank [2022] — Maths (commerce) STD 12 Commerce / Arts — Question

Maharashtra BoardEnglish MediumSTD 12 Commerce / ArtsMaths (commerce)Question Bank [2022]1 Mark
MCQ
If $X \sim B\left(20, \frac{1}{10}\right)$, then $E(X)=$ _______
  • ✓
    $2$
  • B
    $5$
  • C
    $4$
  • D
    $3$
✓

Answer

Correct option: A.
$2$
If $X \sim B\left(20, \frac{1}{10}\right)$, then $E(X)=\underline{ 2 }$.
Explanation:
$X \sim B\left(20, \frac{1}{10}\right) \ldots . .(\text { Given) }$
$\therefore n=20, p=\frac{1}{10} $
$E(X)=n p $
$=20 \times \frac{1}{10} $
$=2 .$

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