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klasskru [66]
3 years ago
11

A small class has 10 students, 5 of whom are girls and 5 of whom are boys. The teacher is going to choose two of the students at

random. What is the probability that the first student chosen will be a girl and the second will be a boy? Write your answer as a fraction in simplest form.
Mathematics
2 answers:
Tanzania [10]3 years ago
6 0

Answer:

The required probability is 5/18.

Step-by-step explanation:

Total number of total students = 10

Number of girls = 5

Number of boys = 5

Formula for probability:

Probability=\frac{\text{Favorable outcome}}{\text{Total outcome}}

The probability that the first student chosen will be a girl = \frac{5}{10}=\frac{1}{2}

After selecting 1 student, the total number of student is

10-1=9

The probability that the second student chosen will be a boy = \frac{5}{9}

The probability that the first student chosen will be a girl and the second will be a boy is

P=\frac{1}{2}\times \frac{5}{9}

P=\frac{5}{18}

Therefore the required probability is 5/18.

Rus_ich [418]3 years ago
4 0
5 girls, 5 boys...total of 10 students

P(1st pick is a girl) = 5/10 which reduces to 1/2
P(2nd pick is a boy) = 5/9 

P (both) = 1/2 * 5/9 = 5/18 <=
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Answer:

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Step-by-step explanation:

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The object should be placed 20/cm from the lens so as to form its real image on the screen

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The mirror equation is given according to the expression below;

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