1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Irina18 [472]
3 years ago
7

In a class of 30 students there are 17 girls. two students are picked randomly to represent the class in the SRC. determine the

probability that:
a. both students are boys
b. both students are girls
c. one of the students is a boy
Mathematics
1 answer:
Alla [95]3 years ago
4 0

Answer:

See below in bold,.

Step-by-step explanation:

There are 30-17 = 13 boys in the class.

a.  Prob(First is a boy ) = 13/30 and Prob( second is a boy = 12/29).

As these 2 events are independent:

Prob( 2 boys being picked) = 13/30 * 12/29 =  26/145 or 0.179 to the nearest thousandth.

b. By a similar method to a:

Prob ( 2 girls being picked) =  17/30 * 16/29 = 136/435 = 0.313 to the nearest thousandth.

c.  Prob (First student is a boy and second is a girl) =  13/30 * 17/29 = 221/870.

Prob ( first student is a girl and second is a boy)  = 17/30 * 13/29 = 221/870

These 2 events are not independent so they are added:

Prob( one of the students is a boy)  = 2 (221/870 =  221/435 = 0.508 to the nearest thousandth.

You might be interested in
Solve the equation <br>50=4(x-7)-6(3x-6)
rusak2 [61]

we are given

50=4(x-7)-6(3x-6)

Firstly , we can distribute

50=4x-28-18x+36

now, we can combine like terms

50=-14x+8

-14x=42

now, we can solve for x

and we get

x=-3...........Answer

3 0
3 years ago
Read 2 more answers
Help I’m doing a test.... what is 3(2x-9) =
eimsori [14]

Answer:

6x - 27

Step-by-step explanation:

3 x 2x - 3 x 9 =

6x - 27

Hope that helps!

5 0
3 years ago
Read 2 more answers
12 - C = –16<br> solve for C
inna [77]

Answer:

28

Step-by-step explanation:

1) subtract 12 from both sides

2) divide by negative 1

3 0
3 years ago
Read 2 more answers
You buy a bunch of snacks from the grocery story that cost $9.50. You also have a 10% off your total purchase coupon. The tax ra
Bond [772]

Answer:

889 or 900

Step-by-step explanation:

I found 4 percent of 9.50 and added it, then found 10 percent and added it.

4 0
3 years ago
Kelly bought a computer that was 20% off the regular price of $1,060. If a 7% sales tax was added to the cost of the computer, w
fomenos

Answer: $ 1361.04

Step-by-step explanation:

Discount will be 1060 * 20% = 212

Sales price 1060 + 212 = 1272

Tax 7% = 89.04

Kelly paid 1272 + 89.04 = 1361.04

4 0
3 years ago
Other questions:
  • How to solve 3x+5=-13
    14·1 answer
  • Y=3x^2+6x-7/(x+1)^2 Show that dy/dx = 20/(x+1)^3
    6·1 answer
  • Subtract the mixed numbers.<br> 15 5/7 − 6 4/5
    15·2 answers
  • Help me with this question please!!
    12·1 answer
  • Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. const
    6·1 answer
  • Which math operation determines the following recursive sequence!
    7·2 answers
  • Find the product? (n - 4)(3n+7)
    7·2 answers
  • Show that: LHS = RHS​
    7·1 answer
  • Bob and Cheryl are taking a road trip that is 181.60 miles bob drove 1.4 of the total distances how many mile did bob drive
    15·1 answer
  • Please help me solve
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!