nicollexo21
nicollexo21 nicollexo21
  • 01-02-2019
  • Mathematics
contestada

Help me please ASAP

Help me please ASAP class=

Respuesta :

parmesanchilliwack parmesanchilliwack
  • 01-02-2019

Answer: [tex]\frac{5}{35}[/tex]

Step-by-step explanation:

Since, the total number of contestant = 7,

Thus, the probability that out of 3 contestant, me and my friend is chosen

= [tex]\frac{2_C_2\times 5_C_1}{7_C_3}[/tex]

= [tex]\frac{\frac{2!}{2!0!}\times \frac{5!}{1!\times 4!}}{\frac{7!}{4!\times 3!}}[/tex]

= [tex]\frac{1\times 5}{\frac{7\times 6\times 5\times 4!}{4!\times 6}}[/tex]

=  [tex]\frac{5}{35}[/tex]

⇒ Third Option is correct.

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