Scientists believe that Earth once had naturally existing Plutonium-239. Suppose Earth had 10 trillion tons of Pu-239, when it was formed. Given Plutonium half-life of 24000 years and Earth’s current age of 4.6 billion years, how much would remain today. Use your answer to explain why plutonium is not found naturally on Earth today.

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Questions An insurance company's cumulative incurred claims for the last 5 accident years are given in the following table: Development Year Accident Year 0 2018 1 2 3 4 245 267 274 289 292 2019 255 276 288 294 2020 265 283 292 2021 263 278 2022 271 It can be assumed that claims are fully run off after 4 years. The premiums received for each year are: Accident Year Premium 2018 306 2019 312 2020 318 2021 326 2022 330 You do not need to make any allowance for inflation. 1. (a) Calculate the reserve at the end of 2022 using the basic chain ladder method. (b) Calculate the reserve at the end of 2022 using the Bornhuetter-Ferguson method. 2. Comment on the differences in the reserves produced by the methods in Part 1.

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Chapter 8.B, Problem 57E

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Scientists believe that Earth once had naturally existing Plutonium-239. Suppose Earth had 10 trillion tons of Pu-239, when it was formed. Given Plutonium half-life of 24000 years and Earth’s current age of 4.6 billion years, how much would remain today. Use your answer to explain why plutonium is not found naturally on Earth today.

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Questions An insurance company's cumulative incurred claims for the last 5 accident years are given in the following table: Development Year Accident Year 0 2018 1 2 3 4 245 267 274 289 292 2019 255 276 288 294 2020 265 283 292 2021 263 278 2022 271 It can be assumed that claims are fully run off after 4 years. The premiums received for each year are: Accident Year Premium 2018 306 2019 312 2020 318 2021 326 2022 330 You do not need to make any allowance for inflation. 1. (a) Calculate the reserve at the end of 2022 using the basic chain ladder method. (b) Calculate the reserve at the end of 2022 using the Bornhuetter-Ferguson method. 2. Comment on the differences in the reserves produced by the methods in Part 1.

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