A few days ago
HELP! Please don’t just give me the answer. I need to learn how to do it so can you please show me the steps.
A stoplight at the corner of Lincolnway and Duff is red 20% of the time. For someone who drives through this stoplight 10 times per week, what is the probability that they will have to stop at least one time?
Top 2 Answers
A few days ago
Favorite Answer
If it’s red 20 times out of 100 (20%), I hope you KNOW already that means 2 times out of 10, right? If he drives thru it 10 times per week, and its red 2 times out of those 10, the there is a 20% probability that it will be red when he goes thru the light, right?
Thus there is a 20% probability that he will have to stop at least once.
1
A few days ago
WELL I BELIEVE THIS IS HOW YOU WOULD DO THIS PROBLEM.
20 OVER 100 WOULD EQUAL X OVER 10
20 OVER 100 BEING THE PERCENTAGE OF THE LIGHT BEING ON
X BEING THE VARIABLE OVER 10 (THE AMOUNT OF TIMES HE DRIVES BY THE LIGHT
SO THEN YOU JUST DO THE EQUATION:
MULTIPLY 10 BY 20
THE 100 BY X
SO THAT GETS YOU 200=100X
THEN U DIVIDE 100 ON EACH SIDE SO U GET THE VARIABLE BY ITSELF
THEN YOU GET 2=X
SO THE ANSWER IS 2 TIMES A WEEK OR 2%
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