If the members of students activities are to select three speakers among these people, the number of ways this can be done is by using the combination rule as shown;

$nCr=\frac{n!}{(n-r)!r!}$

From the question, n = 5 and r = 3. On substituting

$5C3=\frac{5!}{(5-3)!3!}\\5C3=\frac{5!}{2!3!}\\5C3=\frac{5 \times 4 \times 3!}{2 \times 3!} \\5C3=\frac{20}{2}\\5C3 = 10 ways$

Hence the number of different ways that three speakers can be selected is 10 ways.

Learn more here: brainly.com/question/24145745

7 0

3 years ago

Walt is mixing fruit punch for a party. He combines 1 gallon 2 quarts 3 pints of orange juice,1 gallon 3 quarts 7 pints of pinea

Ann [662]

6.625 Gallons, 26.5 Quarts, or 53 Pints this is the answer

8 0

3 years ago

Can someone help me with these two questions?The last answer choice is 90 degrees.

gizmo_the_mogwai [7]

For the first one:

The radian of 60º is 1.047. you just have to find one that has the same value, which would be $\pi$ /3. (the last choice).

for the second one:

you do it the other way. The answer is 45 degrees.

7 0

3 years ago