Probability MCQ CBSE Maths 12 Science Solutions in English to enable students to get Solutions in a
narrative video format for the specific question.

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Please find the question below and view the Solution in a narrative video format.

** Question:**

** In a game, a man wins rupee five for number six and losses rupee one for any other number, when a fair die is thrown. The man decided to throw a die thrice but to quit as and when he gets a six. Find the expected value of the amount he wins/losses. **

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## Similar Questions from CBSE, 12th Science, Maths, Probability

**Question 1** : Five bad oranges are accidently mixed with 20 good ones. If four oranges are drawn one by one successively with replacement, then find the probability distribution of number of bad oranges drawn. Hence, find the mean and variance of the distribution.

**Question 2** : Out of a group of 30 honest people, 20 always speak the truth. Two persons are selected at random from the group. Find the probability distribution of the number of selected persons who speak the truth. Also find the mean of the distribution. What values are described in this question?

**Question 3** : A and B throw a pair of dice alternatively, till one of them gets a total of 10 and wins the game. Find their respective probabilities of winning, if A starts first.

**Question 4** : Find the mean, the variance and the standard deviation of the number of doublets in three throws of a pair of dice.

**Question 5** : A speaks truth in 75% of the cases, while B in 90% of the cases. In what percent of cases are they likely to contradict each other in stating the same fact? Do you think that statement of B is always true?

### Questions from Other Chapters of CBSE, 12th Science, Maths

### Vector Algebra

**Question 1** : Find the vector quantities :

(i) Work (ii) Force

(iii) Velocity (iv) Displacement.

**Question 2** : Find a vector of magnitude making an angle of with x-axis, with y-axis and an acute angle with z-axis.

**Question 3** : Find a vector in the direction of that has magnitude 7 units.

**Question 4** : Find the scalar and vector components of the vector with initial point (2, 1) and terminal point (-5, 7).

**Question 5** : P and Q are two points with position vectors and respectively. Write the position vector of a point R which divides the line segment PQ externally in the ratio 2:1.

### Inverse Trigonometric Functions

**Question 1** : is equal to :

**Question 2** : If Find the values of x.

**Question 3** : Write in the simplest form:

**Question 4** : If find x.

**Question 5** : is equal to :

### Continuity and Differentiability

**Question 1** : Differentiate the function with respect to x.

**Question 2** : If x and y are connected parametrically by the equation , without eliminating the parameter, find .

**Question 3** : Find for the function .

**Question 4** : Differentiate the function with respect to x.

**Question 5** : If x and y are connected parametrically by the equation , without eliminating the parameter, find .