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
Nat2105 [25]
3 years ago
11

Whats the value of 13C11

Mathematics
1 answer:
vovangra [49]3 years ago
4 0

Answer:

78

Step-by-step explanation:

nC_k = \frac{n!}{k!(n-k)!}

13 C_{11} = \frac{13!}{11! \times (13-11)!}

        = \frac{13!}{11! \times 2!}

       = \frac{ 1 \times 2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9 \times 10\times 11 \times 12 \times 13}{(1 \times 2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9 \times 10\times 11 )\times ( 1 \times 2)}

        =\frac{12 \times 13}{2} \\\\= 6 \times 13\\\\=78

       

You might be interested in
Josh spent $42 on snacks.Maia spend $48 on hotdogs and hamburgers.Max spent 35 on rolls,condiments,lettuce,and tomatoes,and Mark
Andrei [34K]

Answer:

$165

Step-by-step explanation:

Money spent:

Josh=42

Maia=48

Max=35

Mark and Victoria = 40

35 + 40 + 42 + 48 = $165

3 0
4 years ago
Read 2 more answers
You walk 1.5miles in a half an hour. What is your average speed?
katovenus [111]

Answer:

1/10 th of a mile every minute

3 0
3 years ago
Read 2 more answers
Simplify fully square root of 8 x square root of 18
Sati [7]

Answer:

12

Step-by-step explanation:

square root of 8 = 2.82842712475

square root of 18 = 4.24264068712

4.24264068712 × 2.82842712475 = 12

4 0
3 years ago
Read 2 more answers
What is 2x^2-8x<br> factorised*
Otrada [13]

Answer:

2x(x - 4)

Step-by-step explanation:

2 {x}^{2}  - 8x \\  \\  = 2x(x - 4)

8 0
3 years ago
$6% of $17.75<br> Find sales tax
Anastaziya [24]

Answer: 1.07

Step-by-step explanation: multiply the percentage. for ex: 17.75 X .06 = 1.065

7 0
4 years ago
Read 2 more answers
Other questions:
  • If it is 11:15
    7·1 answer
  • Choose the correct description of the graph of the compound inequality: x − 2 &gt; −3 and 3x less than or equal to 12
    15·1 answer
  • In a class, every student knows French or German (or both). 15 students know French, and 17 students know German.
    11·1 answer
  • Need help with can someone help pls​
    11·2 answers
  • Hi please help quick<br><br> has pic of qt and answer choices
    11·1 answer
  • Last week, Jane made deposits of
    6·1 answer
  • ASAP PLEASE HELPPPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEE
    13·2 answers
  • Please help !!!!!!!!!!!!!!! !
    13·1 answer
  • Please help me, i will mark brainliest
    11·1 answer
  • Jerome bought a pair of shoes for $58.13 including tax. The shoes had a sticker price of $54.20. What percent sales tax did he p
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!