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Flauer [41]
3 years ago
11

A tank can hold 50 liters of water. At present, it is only 30% full. How many liters of water shall I put in the tank, so that i

s it 50% full?
Mathematics
1 answer:
damaskus [11]3 years ago
5 0

Calculate how many liters you need to be half full:

50 liters x 50% = 50 x 0.5 = 25 liters to be half filled.

Calculate how many liters are in the tank now:

50 x 0.30 = 15 liters

Now subtract to find how many more liters are needed:

25 - 15 = 10 more liters.

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In a class of 25 students, 15 of them have a driver's license. If ten students are randomly selected, what is the expected numbe
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Step-by-step explanation:

<u><em>Explanation</em></u>:-

Given data In a class of 25 students, 15 of them have a driver's license

The sample proportion

                                p = \frac{x}{n} = \frac{15}{25} = 0.6

Let 'X' be the binomial distribution

Given sample size 'n' = 10

<em>mean of the binomial distribution or expected number of students  would have a driver's license</em>

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