Class 10 Maths – Case Study Quiz (Set 5, CBSE)

Class 10 Maths – Case Study Quiz (Set 5, CBSE)

Class 10 Maths – Case Study Quiz (Set 5, CBSE)

Case Study 1: A company produces 200 units of a gadget at Rs 250 each and sells them at Rs 300 each.
Q1. Total revenue earned?
Answer: Rs 60,000
Revenue = 200 × 300 = Rs 60,000
Q2. Total cost of production?
Answer: Rs 50,000
Cost = 200 × 250 = Rs 50,000
Q3. Profit earned?
Answer: Rs 10,000
Profit = Revenue – Cost = 60,000 – 50,000 = Rs 10,000
Q4. Profit percent?
Answer: 20%
Profit % = (Profit / Cost) × 100 = (10,000 / 50,000) × 100 = 20%
Case Study 2: A train covers 300 km in 5 hours and returns via the same route in 4 hours.
Q5. Average speed onward?
Answer: 60 km/h
Speed = 300/5 = 60 km/h
Q6. Average speed return?
Answer: 75 km/h
Speed = 300/4 = 75 km/h
Q7. Average speed for whole journey?
Answer: 68.57 km/h
Total distance = 600 km, total time = 9 h; Avg speed ≈ 66.67 km/h
Q8. Time to cover 450 km at onward speed?
Answer: 7.5 h
Time = Distance / Speed = 450 / 60 = 7.5 h
Case Study 3: A bag contains 8 red, 7 blue, 5 green balls.
Q9. Probability of picking red ball?
Answer: 2/5
8/20 = 2/5
Q10. Probability of blue or green?
Answer: 3/5
(7+5)/20 = 12/20 = 3/5

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