Download App

Probability — MATHS STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceMATHSProbability1 Mark
Question
The probability distribution of a discrete random variable X is given below:
$\text{X}:$ $2$ $3$ $4$ $5$
$\text{P}(\text{X}):$ $\frac{5}{\text{k}}$ $\frac{7}{\text{k}}$ $\frac{9}{\text{k}}$ $\frac{11}{\text{k}}$
The value of k is:
✓

Answer

  1. 32
Solution:
$\sum\limits_2^5\text{P}(\text{x})=1$
$\frac{5}{\text{k}}+\frac{7}{\text{k}}+\frac{9}{\text{k}}+\frac{11}{\text{k}}=1$
$\text{k}=32$
NOTE: Question is modified.

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→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Choose the correct answer from the given four options.If two events are independent, then:
→
The plane $2\text{x}-(1-\lambda)\text{y}+3\lambda\text{z}=0$ passes through the intersection of the planes:
→
The objective function of LPP defined over the convex set attains its optimum value at.
  1. Atleast two of the corner points.
  2. All the corner points.
  3. Atleast one of the corner points.
  4. None of the corner points.
→
Which of the following is the integrating factor of $( x \log x ) \frac{d y}{d x}+ y =2 \log x ?$
→
If $A$ is any square matrix, then which of the following is skew$-$symmetric?
→
A five-digit number is written down at raddom. The probability that the number is divisible by 5, and no two consecutive digits are identical, is:
→
The optimal value of the objective function is attained at the points.
  1. Given by intersection of inequation with y - axis only.
  2. Given by intersection of inequation with x - axis only.
  3. Given by corner points of the feasible region.
  4. None of these
→
A line OP where O = (0, 0, 0) makes equal angles with ox, oy, oz. The point on OP, which is at a distance of 6 units from O is:
→
If $|\vec{a}-\vec{b}|=|\vec{a}+\vec{b}|$ then the angle between $\vec{a}$ and $\vec{b}$ will be -
→
Consider a non-empty set consisting of children in a family and a relation R defined as aRb if a is brother of b. Then, R is:
  1. Symmetric but not transitive.
  2. Transitive but not symmetric.
  3. Neither symmetric nor transitive.
  4. Both symmetric and transitive.
→