Topic: Engineering Mathematics
A man draws 3 balls from a jug containing 5 white and 7 black balls. He gets Rs. 20 for each white ball and Rs. 10 for each black ball. What is his expectation?
- A. Rs. 21.25
- B. Rs. 42.50
- C. Rs. 31.25
- D. Rs. 45.21
Answer: B. Rs. 42.50
Explanation: This requires calculating the expected value by summing the product of each outcome's value and its probability. The calculation results in an expected value of Rs. 42.50.