Question

There are 8 boys and 12 girls in Mr Rossi’s class one student will be chosen randomly to represent the class at a conference of seventh grade students what is the probability that the representative will be a girl

Answer 1

Answer:

0.6 or 60%.

Step-by-step explanation:

Given: There are 8 number of boys in the class.

           There are 12 number of girls in the class.

Now, finding total number of students in the class of Mr Rossi.

Total number of students= $number\ of\ boys+ number\ of\ girls$

∴ Total number of students in the class= $8+12= 20\ students$

Next finding the probability of having representative will be a girl.

Probability of having girl= $\frac{Number\ of\ favorable\ outcome}{Total\ number\ of\ outcomes}$

⇒ Probability of having girl= $\frac{12}{20} = \frac{3}{5}$

∴ Probability of having girl as a representative= $\frac{3}{5}$

Converting the fraction into decimal, we will get 0.60 and in percentage, we will get 60%.

∴ 0.60 or 60% probability that the representative will be a girl.