The library is to be given 5 books as a gift. the books will be selected from a list of 21 titles. if each book selected must have a different title, how many possible selections are there?
Answers
This is a combination problem. Order does not matter and the books are all different. You would write this as 21C5 or . Combinations are not fractions.
The answer is
which = 20349 different ways these books can be chosen.
Answer:
20,349.
Step-by-step explanation:
We have been that a library is to be given 5 books as a gift. the books will be selected from a list of 21 titles.
We will combinations to solve our given problem.
Different ways to choose 5 books from 21 tiles:
Therefore, there are 20349 possible selections.
Related Questions
Two neighbors both have rectangular swimming pools in thir backyards. one neighbors pool has dimensions that are twice as great as the dimensions of the others pool. What is the ratio of the volumes of the two poolsa) 1:1b) 2:1c) 4:1d) 8:1e) 16:1
3. Mr Reder has just robbed a bank and is trying to escape on foot. He iscurrently 3 miles from the bank and running at 5 miles per hour.a. Write an equation to model how far from the bank Mr Reder isafter a certain amount of time has passed.b. How far has he gone after 3 hours?c. Draw an appropriate graph for this equation.
You drive 1400 miles in 3.5 days. You drive an equal number of miles each day. How many miles do you drive each day.
En la granja hay 509 puercos anota el número antecesor y el número sucesor de la cantidad.
No explanation necessary, I need an answer in two words or less
Answers
Answer: circle
Step-by-step explanation:
All cross sections of a sphere are circles.
Answers
Answer:
The treasure is 0.8 inches from the south edge on Ali's map.
Step-by-step explanation:
Scaling factor, f = (Original length)/(Scalet length)...(i)
Let and
be the scaling factors used by Ali and Kiana respectively.
Given that the field is 400 feet= 400x12 inches wide and Ali made an 8-inch-wide map to record its location.
So, ...(ii)
Kiana made her map using a scale of 1-inch to 20 feet=20x12 inches.
So, ...(iii)
As on Kiana's map, the treasure is 2 inches from the south edge of the field,
so, from equations (i), and (ii), the original length of the treasure for the south edge of the field
=2x240
=480 inches
Now, again from the equation (i) and (ii), the scaled length of the treasure on Ali's map
= 480/f_1
=480/600
=0.8 inches
Hence, the treasure is 0.8 inches from the south edge on Ali's map.
Answers
well and 300% increase means you multiply by 3 and then add the original number
in this case 300% of 25 is 75 and its an increase so 25+75=100
the answer is 100
Answers
If we really wanted to we could turn this into the fraction 8/4
8 being the amount of carrot sticks he ate and 4 being the time it took
now all u have to do is simplify that turns into 2/1 and since the 1 is one minute and her can eat 2 in one minute we can safely say he eats 1 carrot stick every 30 seconds
:) hope this helps!!
Answers
The measure of ∠x is 60°, and the measure of ∠y is 90°, the measure of ∠z is 30°
What is an angle ?
An angle is a mathematical term, which we can define, when two straight lines or rays meet at a common endpoint. The common point is called the vertex of an angle. The word angle comes from a Latin word named ‘angulus,’.
Interior angles:- The inner angle made by the intersection of two polygonal sides.
Exterior angles:- The outer angle made by the intersection of two polygonal sides.
Given that,
In right angle triangle, Δxyz
Angle ∠x is 60°
Angle ∠y is 90°
It is already known that sum of all the interior angles of any triangle is equal to 180°
So,
∠x + ∠y + ∠z = 180°
60° + 90° + ∠z = 180°
∠z = 30°
Therefore, the third angle is 30°
To know more about angle check:
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A fence is placed along the entire perimeter of the triangular garden. The roll of fencing is 40 ft long.
Part B: Write a simplified expression to show the amount of fencing, in feet, which is left from the roll of fencing.