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3 years ago

(06.01)A class has 15 boys and 16 girls. What is the probability that a boy's name is drawn at random?

Mathematics

2 answers:

kolbaska11 [484]3 years ago

7 0

The correct answer is 48%. 15 + 16 = 31, and 15/31 = 0.48, so your answer is 48%. Hope this helps!

brilliants [131]3 years ago

4 0

The answer would be:
-as a fraction: $\frac{15}{31}$ , since there are a total of 31 kids and 15 boys.
-as a percentage: 48 percent. to find the percentage, you add both numbers (15+16) which is 31. As you can see, the fraction is $\frac{15}{31}$ . now 15 divided by 31 is 0.48. 48%.
-as a ratio: 15:31 the explanation for this is the same as a fraction.

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The ratios are Surface area ⇒ 4 : 25 Height ⇒ 2 : 5 and Volume ⇒ 8 : 125

<h3>How to determine the ratios?</h3>

The scale factor is given as:

m : n = 2 : 5

For the area, we take the square of the ratios.

i.e.

Area = 2^2 : 5^2

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For the volume, we take the cube of the ratios.

i.e.

Volume = 2^3 : 5^3

Evaluate

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The given scale factor can be used for the height of the model and the original bicycle

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Height ⇒ 2 : 5

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