Answer: The required probability is
Step-by-step explanation: Given that a box contains 4 red balls, 5 white balls, and 7 blue balls and we choose two balls at random from the box.
We are to find the probability that neither being red given that neither is white.
Let A and B denote the events that neither of the two balls are red and neither of he two balls are white.
Then, the probabilities of events A and B are given by
The probability that neither of the two balls are red or white is
Therefore, the probability that neither being red given that neither is white is given by
Thus, the required probability is
Since its asking about a balloon material, the question is asking for the surface area.
You can round 396 to 400 and 71 to 70. then you just multiply them and get 28,000. :))
I would say that it is 81. I hoped this helped and the steps are first what is 16 divided by 2 is 9 then you do 9 times 9 witch is 81.
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➷ As there would be 2 circles, you'd need to find the area of a circle and then multiply it by 2
To start with, we can use this:
2 (r^2)
^^ This represents the surface area of the two circles
A cylinder also has a rectangle which is rolled to form the shape
As we know, the formula of a rectangles area is length x width
The width of the rectangle would be equal to the circumference of a circle
circumference of circle =
The length of the rectangle would be the height of the cylinder
We can use this:
This would calculate the surface area as it would find the area of the rectangle plus the area of the two circles.
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➶ Hope This Helps You!
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