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
goldfiish [28.3K]
3 years ago
14

There are 8 books in a shelf that consist of 2 paperback books and 6 hardback books. If 4 books are selected at random without r

eplacement, how many different combinations are there that at least one paperback book is selected?A. 40B. 45C. 50D. 55E. 60
Mathematics
1 answer:
mixer [17]3 years ago
4 0

Answer:D

Step-by-step explanation:

This is combination.

If 4 books selected out of eight book in the shelf:

(4 combination 8)= 70

For hardback selection:

Then selection of 4 books out of the hardback, it means there is no paperbach will be:

(4 combination 6)= 15

So , if at least one paperback selected will be : 70-15

That is 55

You might be interested in
How many unit angles does the smaller angle of a tan pattern block turn through
tresset_1 [31]
Is there an attachment to this? It cant be answered without a picture or a description.
3 0
3 years ago
The temperature is 6°F outside right now and is dropping 2° every hour. Aletta wants to know how many hours it will take for the
DedPeter [7]

Answer:

It will take 8 hours

Step-by-step explanation:

7 0
3 years ago
if the heart of an elephant , at rest beat an average of 1680 beats in 60 min . What is the rate in beats per minute
Tresset [83]
Use the rule of 3 simple 

1680 beats ------- 60 min.
x beats -------------- 1 min. 
----------------------------------
 x = (1680*1)/60 = 1680/60 = 168/6 = 28 beats per minute 

hope helped 
5 0
3 years ago
What is a solid figure with two congruent parallel polygonal bases?
nika2105 [10]

A solid figure that has two congruent, parallel polygons as its bases would be a prism, and its sides are parallelograms.

3 0
3 years ago
Anyone good at trigonometry?<br> I need a tutor or something cause I suck
SVEN [57.7K]

Answer:

I'll help if you need it.

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • What is the value of x?<br> sin(x + 22)° = cos(2x - 7)º
    12·2 answers
  • If a plant manufacturing carpet backing has a cylindrical tank that is 3 meters high and is 6 meters in diameter, what is the vo
    11·2 answers
  • PLEASE HELP!!!! for the given situation identify the independent and dependent variables and then find a reasonable domain and r
    14·1 answer
  • The product of two consecutive room numbers is 342. Find the room numbers.
    12·1 answer
  • What is the value of 9 packs of Sweets if one pack of sweet cost Rs 120.5?
    14·2 answers
  • Please help explain y = 2x + 3
    5·1 answer
  • Which input value produces the same output value for the
    6·1 answer
  • WILL GIVE BRAINLIEST
    6·1 answer
  • How many solutions to 10x - 6 = 10 x + 6
    5·1 answer
  • F=((-1,1),(1,-2),(3,-4)) g=((5,0),(-3,4),(1,1),(-4,1)) find (f/g)(1)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!