broskiman2004 broskiman2004

27-09-2020
Mathematics

contestada

Abby is adopting kittens from the pet store. if there are 18 kittens, how many ways can she choose 2 kittens? the answer isnt 9 or 32

Respuesta :

oscar236 oscar236

27-09-2020

Answer:

153 ways.

Step-by-step explanation:

The answer is the number of combinations of 2 from 18

= 18! / 2! (18-2)!

= 18! / 2! 16!

= 18*17*16! / 2! 16!

= 18 * 17 / 2*1

= 9 * 17

= 153 ways.

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