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jaidyn3mccoy6
26.02.2020 •
Social Studies
If 75 percent of a class answered the first question on a certain test correctly, 55 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly?
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Ответ:
50% of the class answered both questions correctly
Explanation:
To find the percentage of the class that answered both questions correctly, we must first find the combined percentage of the class that answered question 1, question 2 or both questions correctly.
= Total percentage of the class - Percentage that didn't answer any of the 2 questions correctly
i.e 100%-20%=80%
Let's now denote x% for the percentage of the class that answered both questions correctly.
Meanwhile, percentage of the class that answered only question 1 correctly = 75-x% and percentage of the class that answered only question 2 correctly = 55-x%
Remember that % of those that answered only question 1 + % of those that answered only question 2 + % of those that got both answers correctly = 80%
= 75-x% + 55-x% + x%=80%
= 75-x + 55-x + x = 80
= 75 + 55 - x = 80
= 130 - x = 80
x = 50%
50% of the class answered both questions correctly
Ответ:
Congress can override a veto by passing the act by a two-thirds vote in both the House and the Senate. (Usually an act is passed with a simple majority.) This check prevents the President from blocking an act when significant support for it exists.
hope this helps
Explanation: