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1 pointTwo fair dice are rolled simultaneously. Let ๐‘ŒY represent the sum of the numbers appearing on the upper faces of the dice. Determine the moment-generating function (MGF) of ๐‘Œโˆ’๐ธ[๐‘Œ]Yโˆ’E[Y]. Select all correct options from below.๐‘’โˆ’3.5๐‘กโ‹…16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)e โˆ’3.5t โ‹… 61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )[๐‘’โˆ’3.5๐‘กโ‹…16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)]2[e โˆ’3.5t โ‹… 61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )] 2 ๐‘’โˆ’7๐‘กโ‹…136(๐‘’โˆ’5๐‘ก+2๐‘’โˆ’4๐‘ก+3๐‘’โˆ’3๐‘ก+4๐‘’โˆ’2๐‘ก+5๐‘’โˆ’๐‘ก+6+5๐‘’๐‘ก+4๐‘’2๐‘ก+3๐‘’3๐‘ก+2๐‘’4๐‘ก+๐‘’5๐‘ก)e โˆ’7t โ‹… 361โ€‹ (e โˆ’5t +2e โˆ’4t +3e โˆ’3t +4e โˆ’2t +5e โˆ’t +6+5e t +4e 2t +3e 3t +2e 4t +e 5t )

Question

1 pointTwo fair dice are rolled simultaneously. Let ๐‘ŒY represent the sum of the numbers appearing on the upper faces of the dice. Determine the moment-generating function (MGF) of ๐‘Œโˆ’๐ธ[๐‘Œ]Yโˆ’E[Y]. Select all correct options from below.๐‘’โˆ’3.5๐‘กโ‹…16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)e โˆ’3.5t โ‹… 61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )[๐‘’โˆ’3.5๐‘กโ‹…16(๐‘’๐‘ก+๐‘’2๐‘ก+๐‘’3๐‘ก+๐‘’4๐‘ก+๐‘’5๐‘ก+๐‘’6๐‘ก)]2[e โˆ’3.5t โ‹… 61โ€‹ (e t +e 2t +e 3t +e 4t +e 5t +e 6t )] 2 ๐‘’โˆ’7๐‘กโ‹…136(๐‘’โˆ’5๐‘ก+2๐‘’โˆ’4๐‘ก+3๐‘’โˆ’3๐‘ก+4๐‘’โˆ’2๐‘ก+5๐‘’โˆ’๐‘ก+6+5๐‘’๐‘ก+4๐‘’2๐‘ก+3๐‘’3๐‘ก+2๐‘’4๐‘ก+๐‘’5๐‘ก)e โˆ’7t โ‹… 361โ€‹ (e โˆ’5t +2e โˆ’4t +3e โˆ’3t +4e โˆ’2t +5e โˆ’t +6+5e t +4e 2t +3e 3t +2e 4t +e 5t )

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Solution

The moment-generating function (MGF) of a random variable is a function that generates the moments of the distribution. The MGF of a random variable Y is given by M(t) = E[e^(tY)].

In this case, Y is the sum of the numbers appearing on the upper faces of two fair dice, and we are asked to find the MGF of Y - E[Y].

First, we need to find the expected value E[Y]. Since each die has 6 faces, each with equal probability of 1/6, the expected value E[Y] of the sum of two dice is E[Y] = 2 * (1/6 * (1 + 2 + 3 + 4 + 5 + 6)) = 7.

So, we are asked to find the MGF of Y - 7.

The MGF of Y - 7 is given by M(t) = E[e^(t(Y - 7))].

This simplifies to M(t) = e^(-7t) * E[e^(tY)].

The MGF of the sum of two dice Y is given by E[e^(tY)] = (1/36) * ฮฃ e^(tx), where the sum is over all possible values of x (the sum of two dice), x = 2, 3, ..., 12.

So, the MGF of Y - 7 is M(t) = e^(-7t) * (1/36) * (e^(2t) + e^(3t) + 2e^(4t) + 2e^(5t) + 3e^(6t) + 3e^(7t) + 4e^(8t) + 4e^(9t) + 3e^(10t) + 3e^(11t) + 2e^(12t) + 2e^(13t) + e^(14t) + e^(15t)).

So, the correct option is ๐‘’โˆ’7๐‘กโ‹…136(๐‘’โˆ’5๐‘ก+2๐‘’โˆ’4๐‘ก+3๐‘’โˆ’3๐‘ก+4๐‘’โˆ’2๐‘ก+5๐‘’โˆ’๐‘ก+6+5๐‘’๐‘ก+4๐‘’2๐‘ก+3๐‘’3๐‘ก+2๐‘’4๐‘ก+๐‘’5๐‘ก).

This problem has been solved

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