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Ms. Rogers asked 15 piano students how many hours of practice they put in each week. The list shows the data she recorded.
1 answer:
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Answer:
Sugar concentration of the mixed soft drink will be <em>32.5%.</em>
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Step-by-step explanation:
Sugar concentration of first drink = 20%
Volume of first soda = 250 ml
Sugar in first soda = 20% of 250 ...... (1)
Sugar concentration of second drink = 45%
Volume of second soda = 250 ml
Sugar in second soda = 45% of 250 ...... (2)
Let be the sugar concentration in resultant mixture.
Volume of mixture = 250 + 250 = 500 ml
Sugar in mixture = of 500 ml ...... (3)
Total sugar concentration (Adding (1) and (2)) and equating it to equation (3):
20% of 250 + 45% of 250 = of 500
Hence, Sugar concentration of the mixed soft drink will be <em>32.5%.</em>
Answer:
(a)
(b)
<em>(b) is the same as (a)</em>
(c)
(d)
(e)
Step-by-step explanation:
Given
Solving (a): Probability of 3 or fewer CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (b): Probability of at most 3 CDs
Here, we consider:
This probability is calculated as:
This gives:
<em>(b) is the same as (a)</em>
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Solving (c): Probability of 5 or more CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (d): Probability of 1 or 2 CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (e): Probability of more than 2 CDs
Here, we consider:
This probability is calculated as:
This gives: