Stela's piano lesson starts at 4:30. The lesson is 50 minutes long. When does her lesson end?

2 answers:

8 0

Stela's lesson would end at 5:20, because 4:30 is the start time of her class and it is 50 minutes long so you want to add and like this

4:30
+
50
----------------
4:80

since there are 60 minutes in an hour you would make it like 80-60 which is 20 so u would do 5:00 + 20 minutes

Your welcome, pls make this the brainliest and have a nice day

Lorico [155]2 years ago

7 0

The answer is at 5:20

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Please help will give brainliest

deff fn [24]

Since the sum of the probabilities of all possible outcomes must be 100%, we can deduce the following:

Cooking in under 20 minutes: 10%
Cooking between 20 and 30 minutes: 85%
Cooking in more than 30 minutes: 5%

In fact, the probabilities of cooking in less than 20 or more than 30 sum up to 15%, which means that the remaining outcome (i.e. cooking time between 20 and 30) must complete this probability to 15, and in fact 15+85=100.

That being said, all three answers are simply a combination of these three scenarios: let C be the cooking time, for aesthetic reasons:

$P(C\geq 20) = P(20 \leq C \leq 30)+P(C\geq30) = 85\%+5\%=90\%$