**CBSE Case Study Questions Class 9 Maths Chapter 15 **are very important to solve for your exam. Class 9 Maths Chapter 15 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based** **questions for Class 9 Maths Chapter 15 **Probability**

## Case Study Questions Class 9 Maths Chapter 15 Probability

**Case Study/Passage-Based Questions**

**Case Study 1: **A jeweler has different types of bracelets in his shop. Sunita wants to purchase a bracelet for her sister’s birthday gift. When Sunita goes to the shop, she founds the following data which represents the number of bracelets of different types in the shop.

**Find the probability that Sunita chooses Chain Bracelet.**(a) 23/180 (b) 37/180

(c) 37/90 (d) 23/90

Answer: (b) 37/180

**Find the probability that she chooses Pearl bracelet.**(a) 23/180 (b) 37/180 (c) 37/90 (d) 23/90

Answer: (d) 23/90

**What is the probability of a sure event?**(a) 1 (b) 0 (c) 1/2 (d) 2/3

Answer: (a) 1

**What is the probability that she chooses neither Bangle bracelet nor Pearl bracelet?**(a) 23/180 (b) 45/180 (c) 109/180 (d) 23/45

Answer: (c) 109/180

**What is the probability that Sunita purchased a Cuff bracelet?**(a) 6/17(b)2/13 (c) 1 (d) 2/15

Answer: (d) 2/15

**Case Study/Passage-Based Questions**

**Case Study 2: **In a factory, the workers are paid on a daily basis. The new manager wants to know the salary slab of the workers and finds the data given below.

Now, if a worker is chosen at random, then :

**The probability that the worker is getting at most ₹ 500 is**(a) 3/80 (b) 9/80 (c) 1/80 (d) 4/25

Answer: (b) 9/80

**The probability that the worker is getting at least ₹ 701 is**(a) 23/80 (b) 43/80 (c) 41/80 (d) 61/80

Answer: (b) 43/80

**Probability that the worker is getting at most ₹ 900 is**(a)7/40 (b) 3/31 (c) 31/40 (d) 4/31

Answer: (c) 31/40

**Case Study 3: **A group of students is studying probability in their math class. They encountered the following scenario:

Rajesh and Aisha decided to conduct an experiment with a deck of playing cards to understand the concept of probability. They made the following observations:

- Rajesh drew a card from a standard deck of 52 playing cards and found that it was a spade.
- Aisha drew a card from the same deck and found that it was a face card (king, queen, or jack).

Based on this information, the students were asked to analyze the probabilities of their respective outcomes. Let’s see if you can answer the questions correctly:

**MCQ Questions:**

**Q1. The probability of drawing a spade card, as observed by Rajesh, is:**(a) 1/4

(b) 1/13

(c) 1/52

(d) Cannot be determined

Answer: (a) 1/4

**Q2. The probability of drawing a face card, as observed by Aisha, is:**(a) 3/13

(b) 4/13

(c) 1/13

(d) Cannot be determined

Answer: (a) 3/13

**Q3. In a standard deck of playing cards, the probability of drawing a spade card is:**(a) 1/4

(b) 1/13

(c) 1/52

(d) 1/2

Answer: (a) 1/4

**Q4. In a standard deck of playing cards, the probability of drawing a face card is:**(a) 3/13

(b) 4/13

(c) 1/13

(d) 1/4

Answer: (b) 4/13

**Q5. If Rajesh drew a card and found that it was a spade, what is the probability that it is also a face card?**(a) 1/13

(b) 3/13

(c) 1/4

(d) 1/2

Answer: (c) 1/4

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