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SOVA2 [1]
3 years ago
11

How many ways are there to choose a committee of 3 people from a group of 9 people?

Mathematics
1 answer:
QveST [7]3 years ago
3 0
C r = (n!)/(r!(n-r)!)
9 C 3 = (9!)/(3!*(9-3)!)
9 C 3 = (9!)/(3!*6!)
9 C 3 = (9*8*7*6!)/(3!*6!)
9 C 3 = (9*8*7)/(3!)
9 C 3 = (9*8*7)/(3*2*1)
9 C 3 = (504)/(6) 9 C 3 = 84
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jarptica [38.1K]

Answer:

i think it is D

Step-by-step explanation:

hope this helps

3 0
2 years ago
Read 2 more answers
I need help with a math question but apparently everyone is dead today..
Gwar [14]
The answer is D. I’m assuming this is surface area so here’s my explanation:) ok so the area of the triangle is 6 (4x3 divided by 2) and when you add the other triangle that’s 12. Ok so we have 12 so far. Then the area of the bottom rectangle is 24 (3x8). Then the area of the side rectangle is 32 (4x8). THEN the top rectangle’s area is 40 (8x5). When you add the numbers up (12+24+32+40) you get 108! And of course dont forget the cm2. ( centimeters squared ). :) I hope this helps
8 0
2 years ago
The bike store marks up the wholesale cost of all of the bikes they sell by 30%. Andre wants to buy a bike that has a price tag
Step2247 [10]

Answer:

$96.15

Step-by-step explanation:

Given data

markup = 30%

cost price= $125

let the cost price before markup be x

125-30/100*x= x

125-0.3x= x

125= x+0.3x

125= 1.3x

divide both sides by 1.3

x= 125/1.3

x= $96.15

Hence the price before markup is $96.15

6 0
2 years ago
If you flip three fair coins, what is the probability that you'll get two tailed and one head in any order
Scrat [10]
Sample space = HHH, HHT, HTH, THH, TTT, TTH, THT, HTT   (8 possibilities)

Desirable outcomes = TTH, THT, TTH   (3 possibilities)

Required probability = 3/8
6 0
3 years ago
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I neee help plss i have so lil time to hand it in
SashulF [63]

The Solution.

The given equation is

\begin{gathered} y=|x|+7 \\ \text{Where x=11} \end{gathered}

Substituting 11 for x, we can get the value of y.

\begin{gathered} y=|11|+7 \\ y=11+7 \\ y=18 \end{gathered}

Hence, the value of y is 18.

5 0
1 year ago
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