Question

the value of 15c12 is

Answer 1

Answer:

Step-by-step explanation:

15c12= 15*14*13*12*11*10*9*8*7*6*5*4/1*2*3*4*5*6*7*8*9*10*11*12

= 15*14*13/1*2*3

When we again simplify, we get

= 5*7*13/1

=455

Answer 2

SOLUTION

TO DETERMINE

The value of

$\displaystyle \sf{ {}^{15}C_{12} }$

EVALUATION

$\displaystyle \sf{ {}^{15}C_{12} }$

$\displaystyle \sf{ = \frac{15!}{12!(15 - 12)!} }$

$\displaystyle \sf{ = \frac{15!}{12! \: 3!} }$

$\displaystyle \sf{ = \frac{15 \times 14 \times 13 \times 12!}{12! \times \: 3 \times 2} }$

$\displaystyle \sf{ = \frac{15 \times 14 \times 13}{3 \times 2} }$

$\displaystyle \sf{ = 5 \times 7 \times 13 }$

$\displaystyle \sf{ = 455}$

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ If 7. 5pr = 7pr – 1, then find r.(question based on permutation and combination chapter)

https://brainly.in/question/26877723

2. If nPr = 3024 and nCr = 126 then find n and r.

https://brainly.in/question/29044585