2 years ago

Please answer these

Mathematics

1 answer:

lubasha [3.4K]2 years ago

6 0

Answer:

1. 1 hour and 45 mins

2. 3 hours and 25 mins

3. 3 hours and 45 mins

4. 3 hours and 15 mins

5. 3 hours and 30 mins

Step-by-step explanation:

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2. In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviati

Kobotan [32]

Answer: $85,000

Step-by-step explanation:

Given : In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviation of $12,000.

$\mu_M=40,000\ \ ;\sigma_M=12,000$

Female earnings have a mean of $45,000 per year and a standard deviation of $18,000.

$\mu_F=45,000\ \ ;\sigma_F=18,000$

If C denote the combined earnings for a randomly selected couple.

Then, the mean of C will be :-

$\mu_c=\mu_M+\mu_F\\\\=40,000+45,000=85,000$

Hence, the mean of C = $85,000

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