Two prizes

In a class of 15 pupils (7 boys and 8 girls), Teacher Mae is giving away a random prize. What is probability that both prizes are won by girls?

Correct result:

p =  0.2667

Solution:

$p={\displaystyle \frac{8}{15}}\cdot {\displaystyle \frac{7}{14}}={\displaystyle \frac{4}{15}}=0.2667$

Try another example

Showing 0 comments:

Related math problems and questions:

• Ratio of counts
  There are 15 boys and 13 girls in the class. What are the ratio of boys and girls?
• Boys and girls
  There are eight boys and nine girls in the class. There were six children on the trip from this class. What is the probability that left a) only boys b) just two boys
• Pupils
  There are 32 pupils in the classroom, and girls are two-thirds more than boys. a) How many percents are more girls than boys? Round the result to a whole percentage. b) How many are boys in the class? c) Find the ratio of boys and girls in the class. Writ
• Pizza
  A school survey found that 12 out of 15 students like pizza. If 6 students are chosen at random, what is the probability that all 6 students like pizza?
• Class
  In a class are 32 pupils. Of these are 8 boys. What percentage of girls are in the class?
• Scrap
  From 6 products are 3 scrap. What is the probability that the random pick of 2 products have no defective product?
• In the classroom
  There are 30 boys and a few girls in the class. In the six months, 28 boys and all girls benefited, which was 95% of all pupils. How many pupils are there in the classroom?
• Today in school
  There are 9 girls and 11 boys in the class today. What is the probability that Suzan will go to the board today?
• Classroom
  In a class are 32 pupils. Boys are 8 less than girls. How many boys and girls are in the classroom?
• Drawing from a hat
  When drawing numbers from a hat from 1 to 35, we select random given numbers. What is the probability that the drawn numbers will be divisible by 8 and 2?
• Ski class
  Class attend 30 boys and some number of girls. Ski training was attended by 28 boys and all the girls, which was 95% of all students. How many girls attend this class? How many percent is that?
• Classroom
  There are eighty more girls in the class than boys. Boys are 40 percent and girls are 60 percent. How many are boys and how many girls?
• Pupils 7
  There are 40 pupils in a certain class. 3/5 of the class are boys. How many are girls?
• Class pairs
  In a class of 34 students, including 14 boys and 20 girls. How many couples (heterosexual, boy-girl) we can create? By what formula?
• Class - boys and girls
  In the class are 60% boys and 40% girls. Long hair has 10% boys and 80% girls. a) What is the probability that a randomly chosen person has long hair? b) The selected person has long hair. What is the probability that it is a girl?
• Boys and girls
  There are 11 boys and 18 girls in the classroom. Three pupils will answer. What is the probability that two boys will be among them?
• Classroom 4
  In a class of 36 pupils, 2/3 are girls. How much it is in a class girls and boys?