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viva [34]
3 years ago
5

Pleeaaaase hellllpppp asap

Mathematics
2 answers:
muminat3 years ago
7 0

Answer:

Option B

Step-by-step explanation:

the mean is the sum of each value of P(x) multiply for x

Mean= 23x0.16 + 25x0.09 + (26x0.18) + (31x0.12)+ (34x0.24) + (38x0.21)

Mean= 30.47

Anna [14]3 years ago
6 0

Answer:

B. 30.47

Step-by-step explanation:

The mean discrete random variable tells us the weighted average of the possible values given of a random variable. It shows the expected average outcome of observations. It's like getting the weighted mean. The expected value of X can be computed using the formula:

\mu_{x}=x_1p_1+x_2p_2+x_3p_3...+x_kp_k\\\\=\Sigma x_ip_i

Using the data given in your problem, just pair up the x and P(x) accordingly and get the sum.

\mu_{x}=x_1p_1+x_2p_2+x_3p_3+x_4p_4+x_5p_5+x_6p_6\\\\\mu_{x}=(23\times 0.16) + (25\times 0.09) + (26\times 0.18) + (31\times 0.12) + (34\times 0.24) + (38\times 0.21)\\\\\mu_{x} = 30.47

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