3 years ago

3. Brian paid $27 for 12 gallons of gasoline. To the nearest

1 answer:

4 0

Answer:

C that was the answer to mine and it was right

Step-by-step explanation:

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mezya [45]

Answer: C. 30.47

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The mean of discrete random variable i.e. the expected value of X is given by :-

$E(X)=\sum^{i=n}_{i=1} X_iP(X_i)$

Now by using the given table, the expected value of X is given by :-

$\\\\\Rightarrow\ E(X)=23\cdot (0.16)+25\cdot(0.09)+26\cdot(0.18)+31\cdot(0.12)+34\cdot(0.24)+38\cdot(0.21)\\\\\Rightarrow\ E(X)=30.47$

Hence, the mean of discrete random variable= 30.47

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there are 4 sixes soo

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