Download App

Probability — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsProbability1 Mark
MCQ
A bag contains 5 brown and 4 white socks. A man pulls out two socks. The probability that these are of the sane colour is.
  • A
    $\frac{5}{108}$
  • B
    $\frac{18}{108}$
  • ✓
    $\frac{30}{108}$
  • D
    $\frac{48}{108}$
✓

Answer

Correct option: C.
$\frac{30}{108}$
Total number of balls = 5brown + 4white = 9
Required probability $=\frac{5}{9}\times\frac{4}{8}+\frac{4}{9}\times\frac{3}{8}=\frac{4}{9}$
$\Rightarrow\ \frac{4\times12}{9\times12}=\frac{48}{108}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Probability→Probability — all question types→Maths STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The area bounded by the parabola $x = 4 - y^2$ and $y-$axis, in square units, is:
→
$\int_{}^{} {x{{\tan }^{ - 1}}} xdx = $
→
$\int_{}^{} {\frac{{\sqrt {{x^2} + 1} [\log ({x^2} + 1) - 2\log x]}}{{{x^4}}}} dx$ is equal to
→
Two lines $L_1: x=5, \frac{y}{3-\alpha}=\frac{z}{-2}$ and $L_2: x=\alpha, \frac{y}{-1}=\frac{z}{2-\alpha}$ are coplanar. Then $\alpha$ can take value$(s)$

$(A)$ $1$ $(B)$ $2$ $(C)$ $3$ $(D)$ $4$

→
Choose the correct option from given four options : $\frac{\text{dx}}{\sin(\text{x}-\text{a})\sin(\text{x}-\text{b})}$ is equal to :
→
If the order of matrices A and B are 3 × 2 and 2 × 1 respectively, then find the order of matrix (if possible) AB:
→
If the directions cosines of a line are A, k, k, then:
→
$\cot\Big(\text{cosec}^{-1}\frac{5}{3}+\tan^{-1}\frac{2}{3}\Big)=$
→
Find the minor of $a_{22}$ of the matrix
$
\left[\begin{array}{lll}
1 & 6 & 1 \\
5 & 3 & 0 \\
2 & 2 & 9
\end{array}\right] \text {. }
$
→
Choose the correct answer from the given four options.
The position vector of the point which divides the join of points $2\vec{\text{a}}-3\vec{\text{b}}$ and $\vec{\text{a}}+\vec{\text{b}}$ in the ratio 3 : 1 is:
→