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lorasvet [3.4K]
3 years ago
11

The numbers of boys and girls in a class was in the ratio 2:5. After 5 girls were transferred to another class, half of the rema

ining students were boys. How many more girls than boys were there in the class at first?
​
Mathematics
2 answers:
I am Lyosha [343]3 years ago
8 0

Answer:

15

Step by step explanation

Artist 52 [7]3 years ago
6 0

Answer:

15

Step-by-step explanation:

If there are 10 boys and 25 girls, which is a ratio of 2:5, then when 5 girls are transferred, there are 10 boys and 20 girls, meaning half of them are boys, so the class started out with 15 more girls than boys.

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The information provided is as follows:

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Consider the tree diagram attached below.

Compute the probability that a person with restless leg syndrome has fibromyalgia as follows:

P(F|R)=\frac{P(R|F)P(F)}{P(R|F)P(F)+P(R|F')P(F')}

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