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A bag contains 6 white and 4 red balls. If a person draws 2 balls and receives 10 and 20 for a white and red balls respectively, then his expected amount is (a) 25 (b) 26 (c) 29 (d) 28 |
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Answer» Answer: A bag contains 6 white and 4 RED balls. A white ball DRAWN then Rs10 If red ball then Rs20 ⇒ EXPECTATION =2(n1P1 + N2P2) Here P1 = Probability of getting a white ball= Rs.10 Here P2 = Probability of getting a red ball =Rs.20 ∴ Expectation =2[0.6×10+0.4×20] =Rs28. Hence, the answer is Rs.28. Thank you Have a nice day #LoveBrainly |
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