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
SOVA2 [1]
3 years ago
13

Two new drugs are to be tested using a group of 60 laboratory mice, each tagged with a number for identification purposes. Drug

A is to be given to 22 mice, drug B is to be given to another 22 mice, and the remaining 16 mice are to be used as controls. How many ways can the assignment of treatments to mice be made? (A single assignment involves specifying the treatment for each mouse—whether drug A, drug B, or no drug.) (Enter the exact number or an equivalent algebraic expression.)
Mathematics
1 answer:
masya89 [10]3 years ago
4 0

Answer:

\frac{60!}{22!22!16!}

Step-by-step explanation:

As given, drug A is to be given to 22 mice, drug B is to be given to another 22 mice, and the remaining 16 mice are to be used as controls.

Required number of ways = Number of ways to select mice that gets drug A x the number of ways for mice that gets drug B x the number of ways the mice gets no drugs.

= \frac{60!}{22!38!} \times \frac{38!}{22!16!} \times1

Solving this we get;

= \frac{60!}{22!22!16!}

= 314,790,828,599,338,321,972,833,000

You might be interested in
Why is the standard deviation usually preferred over the​ range?
konstantin123 [22]
Standard deviations, σ, is generally preferred over range. Reason being, it is calculated from all the data and when there is outliers it will not be impacted as much as the range. It is great to not also that, The IQR is preferred to the standard deviation when the distribution is very highly skewed or when there are severe outliers, because the IQR is less sensitive to this features than standard deviation.
4 0
3 years ago
Part two for: "HELP ME PLEASEEEE Using the digits 1 - 9, at most one time each, create an improper fraction and a mixed number t
KIM [24]

Answer: 5/3 = 1 10/6

Step-by-step explanation: This is the right answer.

5 0
2 years ago
Write a division equation that has a solution of 42
Allisa [31]
 Heres an equation: 126/3 = 42
4 0
3 years ago
Read 2 more answers
Enter the value of p so the expression 5/6-1/3n is equivalent to p(5-2n)?
inna [77]
P needs to be something that is multiplied through 5-2n to equal 5/6-1/3n.  Since you see that there is a 5 of somesort in both equations an easy place to start is simply making p=1/6.  Once you do that then 5*1/6=5/6 so the first part is okay. Then 2n*1/6=2n/6 which is able to be reduced to n/3.
Based on this it is clear that p should equal 1/6.

4 0
3 years ago
Choose a counterexample that proves that the conjecture below is false.. abc is a right triangle, so angle A measures 90 degrees
andre [41]
Choose a counterexample that proves that the conjecture below is false.. abc is a right triangle, so angle A measures 90 degrees.

Answer: Out of all the options shown above the one that represents the counterexample that proves that the conjecture presented above is false is answer choice 2. Angle b is 90 degrees. The reason being that in a right angle there is only one angle that measures 90 degrees.

I hope it helps, Regards.
6 0
4 years ago
Read 2 more answers
Other questions:
  • On a coordinate plane, two parabolas open up. The solid-line parabola goes through (negative 3, 9), has a vertex at (negative 1,
    10·1 answer
  • Find the area of the figure. Round to the nearest tenth
    11·1 answer
  • Write an equation in point-slope form of the line that passes through the point (2, -8) and has a slope of 4. The equation is y-
    6·1 answer
  • What is the approximate length of the track in miles?
    6·1 answer
  • 4) You can buy 3 apples at the Quick Market for $1.20. You can buy 5 of the
    9·2 answers
  • Which area is closest to the area of Utah?
    13·1 answer
  • You have $225 in your savings account. If you deposit $50 per month into your savings
    11·2 answers
  • Take $27.99 from $42.79.
    12·2 answers
  • What is the value of -3/2÷-7/2?
    14·1 answer
  • When the admission price for a baseball game was $4 per ticket, 50,000 tickets were sold. When the price was raised to $5, only
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!