# CBSE Class 10-Mathematics: Chapter – 15 Probability Part 5 (For CBSE, ICSE, IAS, NET, NRA 2022)

Glide to success with Doorsteptutor material for CBSE : fully solved questions with step-by-step explanation- practice your way to success.

**Question 5**:

defective pens are accidently mixed with good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

**Answer**:

Total number of favourable outcomes

Number of favourable outcomes Hence, P (getting a good pen)

**Question 6**:

Which of the following is polynomial?

(a)

(b)

(c)

(d) None of these

**Answer**:

(d) None of these

**Question 7**:

Polynomial is a

(a) Linear polynomial

(b) Quadratic polynomial

(c) Cubic polynomial

(d) Bi-quadratic polynomial

**Answer**:

(d) Bi-quadratic polynomial

**Question 8**:

If and are zeros of , then the value of is

(a)

(b)

(c)

(d)

**Answer**:

(b)

**Question 9**:

The sum and product of the zeros of a quadratic polynomial are respectively. The quadratic polynomial is

(a)

(b)

(c)

(d)

**Answer**:

(b)

**Question 10**:

Cards each marked with one of the numbers are placed in a box and mixed thoroughly. One card is drawn at random from the box, what is the probability of getting an even prime number?

(a)

(b)

(c)

(d)

**Answer**:

(a)

**Question 11**:

A bag contains red and black balls. A ball is drawn at random from the bag. What is the probability of getting a black ball?

(a)

(b)

(c)

(d) None of these

**Answer**:

(c)

**Question 12**:

A dice is thrown once, what is the probability of getting a prime number?

(a)

(b)

(c)

(d)

**Answer**:

(b)