16.07.2020

Can I please get helped on this problem. It’s a probability one. In a class, there are 20 girls and 16 boys. If the teacher selects two students at random to attend a party with the principal, what is the probability that the two students are both boys?

. 10

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04.03.2022, solved by verified expert
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Number of girls = 20 and number of boys = 16 

Total students = 20 +16 = 36

The number of ways of selecting 2 students from 36 = 36C2 

Number of ways selecting two boys from 16 boys = 16C2 

Therefore the required probability = 16C2 / 36C2 

= (16x15)/ (36x35) 

= (4x3)/(9x7) 

= 4/21

It is was helpful?

Faq

Mathematics
Step-by-step answer
P Answered by PhD

SI=(P*R*T)/100

P=2000

R=1.5

T=6

SI=(2000*1.5*6)/100

=(2000*9)/100

=180

Neil will earn interest of 180

Mathematics
Step-by-step answer
P Answered by PhD

The answer is in the image 

The answer is in the image 
Mathematics
Step-by-step answer
P Answered by PhD

The solution is in the following image

The solution is in the following image
Mathematics
Step-by-step answer
P Answered by PhD

y=2x+15

where y=Value of coin

x=Age in years

Value of coin after 19 years=2*19+15

=$53

Therefore, Value after 19 years=$53

Mathematics
Step-by-step answer
P Answered by PhD
The answer is in the image 

The answer is in the image 

Mathematics
Step-by-step answer
P Answered by PhD

F=ma

where F=force

m=mass

a=acceleration

Here,

F=4300

a=3.3m/s2

m=F/a

    =4300/3.3

    =1303.03kg

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