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V125BC [204]
3 years ago
11

If you choose an answer to this question at random, what is the chance that you will be correct?

Mathematics
2 answers:
tresset_1 [31]3 years ago
3 0
There is 2 25% but it’s still 25%
daser333 [38]3 years ago
3 0
Hello, there!


There are 4 answers.

This adds up to a 100% chance that you will choose an answer.

Now, we must divide this 100% by 4.

100% / 4 = 25%

This means that:

The odds of you choosing an incorrect answer (3 of them are incorrect) is 75%.

The odds of you choosing a correct answer (one of them is correct) is 25%.

Therefore, your answer is 25%

The answer is D.

(If you had guessed randomly, there would have been a 25% of you choosing D.)


I hope I helped!

Let me know if you need anything else!

~ Zoe
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3 years ago
The sum of two numbers is 25 and the sum of their squares is 337. Find<br> the numbers
rewona [7]

Answer: 9 and 16

Step-by-step explanation:

Say one of the numbers is x and the other is y.

Set up a system of equations:

x + y = 25\\x^{2} + y^{2} = 337

Move around the first equation so that you can plug it in to the second equation.

x = 25 - y

Plug it into the second equation.

(25-y)^2 + y^2 = 337

Solve it out.

(625-50y+y^2) + y^2 = 337

625-50y+2y^2=337

288-50y+2y^2=0

Use the quadratic formula to solve for y.

y=\frac{-(-50)+\sqrt{(-50)^2-4(2)(288)} }{2(2)} \\\\y= 16\\y=\frac{-(-50)-\sqrt{(-50)^2-4(2)(288)} }{2(2)} \\\\y = 9

Now plug it in and test out the values of each.

Let's do the first one first.

x + 16 = 25\\x = 9

Wow! We can see that it is equal to the 2nd y value we produced.

But let's double check.

9^2 + 16^2 = 337

We are correct. The order of x and y doesn't matter because we can see that the two numbers are 9 and 16. Hope that helps.

3 0
3 years ago
In the class there are 30 girls and 40 boys find the ratio of the boys to the girls​
puteri [66]

Answer:

3:4

Step-by-step explanation:

3 0
3 years ago
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